diff --git a/technic/crafts.lua b/technic/crafts.lua
index 14bafd3..5d3ae04 100644
--- a/technic/crafts.lua
+++ b/technic/crafts.lua
@@ -164,7 +164,7 @@ minetest.register_craft({
 	recipe = {
 		{'technic:stainless_steel_ingot', 'technic:stainless_steel_ingot', 'technic:stainless_steel_ingot'},
 		{'default:bronze_ingot',          'default:bronze_ingot',          'default:bronze_ingot'},
-		{'moreores:tin_ingot',            'moreores:tin_ingot',            'moreores:tin_ingot'},
+		{'default:tin_ingot',             'default:tin_ingot',             'default:tin_ingot'},
 	}
 })
 
diff --git a/technic/doc/api.md b/technic/doc/api.md
index 2e5b6d3..178ab0a 100644
--- a/technic/doc/api.md
+++ b/technic/doc/api.md
@@ -11,9 +11,12 @@ switching station handles the network activity.
 
 Helper functions
 ----------------
+* `technic.EU_string(num)`
+	* Converts num to a human-readable string (see pretty_num)
+	  and adds the `EU` unit
+	* Use this function when showing players energy values
 * `technic.pretty_num(num)`
-	* Converts the number `num` to a human-readable string.
-	* Use this function when showing players power values.
+	* Converts the number `num` to a human-readable string with SI prefixes
 * `technic.swap_node(pos, nodename)`
 	* Same as `mintest.swap_node` but it only changes the nodename.
 	* It uses `minetest.get_node` before swapping to ensure the new nodename
diff --git a/technic/helpers.lua b/technic/helpers.lua
index 5780f27..5963b68 100644
--- a/technic/helpers.lua
+++ b/technic/helpers.lua
@@ -1,23 +1,56 @@
-local digit_sep_esc
-do
-	local sep = technic.config:get("digit_separator")
-	sep = tonumber(sep) and string.char(sep) or sep or " "
-	-- Escape for gsub
-	for magic in ("().%+-*?[^$"):gmatch(".") do
-		if sep == magic then
-			sep = "%"..sep
-		end
+local constant_digit_count = technic.config:get("constant_digit_count")
+
+-- converts a number to a readable string with SI prefix, e.g. 10000 → "10 k",
+-- 15 → "15 ", 0.1501 → "150.1 m"
+-- a non-breaking space (U+a0) instead of a usual one is put after number
+-- The precision is 4 digits
+local prefixes = {[-8] = "y", [-7] = "z", [-6] = "a", [-5] = "f", [-4] = "p",
+	[-3] = "n", [-2] = "µ", [-1] = "m", [0] = "",  [1] = "k", [2] = "M",
+	[3] = "G", [4] = "T", [5] = "P", [6] = "E", [7] = "Z", [8] = "Y"}
+function technic.pretty_num(num)
+	-- the small number added is due to floating point inaccuracy
+	local b = math.floor(math.log10(math.abs(num)) +0.000001)
+	local pref_i
+	if b ~= 0 then
+		-- b is decremented by 1 to avoid a single digit with many decimals,
+		-- e.g. instead of 1.021 MEU, 1021 kEU is shown
+		pref_i = math.floor((b - 1) / 3)
+	else
+		-- as special case, avoid showing e.g. 1100 mEU instead of 1.1 EU
+		pref_i = 0
 	end
-	digit_sep_esc = sep
+	if not prefixes[pref_i] then
+		-- This happens for 0, nan, inf, very big values, etc.
+		if num == 0 then
+			-- handle 0 explicilty to avoid showing "-0"
+			if not constant_digit_count then
+				return "0 "
+			end
+			-- gives 0.000
+			return string.format("%.3f ", 0)
+		end
+		return string.format("%.4g ", num)
+	end
+
+	num = num * 10 ^ (-3 * pref_i)
+	if constant_digit_count then
+		local comma_digits_cnt = 3 - (b - 3 * pref_i)
+		return string.format("%." .. comma_digits_cnt .. "f %s",
+			num, prefixes[pref_i])
+	end
+	return string.format("%.4g %s", num, prefixes[pref_i])
 end
 
+-- some unittests
+assert(technic.pretty_num(-0) == "0 ")
+assert(technic.pretty_num(0) == "0 ")
+assert(technic.pretty_num(1234) == "1234 ")
+assert(technic.pretty_num(123456789) == "123.5 M")
 
-function technic.pretty_num(num)
-	local str, k = tostring(num), nil
-	repeat
-		str, k = str:gsub("^(-?%d+)(%d%d%d)", "%1"..digit_sep_esc.."%2")
-	until k == 0
-	return str
+
+-- used to display power values
+function technic.EU_string(num)
+	return technic.pretty_num(num) .. "EU"
 end
 
 
diff --git a/technic/machines/LV/cnc.lua b/technic/machines/LV/cnc.lua
index 58ec6ba..fdfec99 100644
--- a/technic/machines/LV/cnc.lua
+++ b/technic/machines/LV/cnc.lua
@@ -48,7 +48,7 @@ local twosize_products = {
 }
 
 local cnc_formspec =
-	"invsize[9,11;]"..
+	"size[9,11;]"..
 	"label[1,0;"..S("Choose Milling Program:").."]"..
 	"image_button[1,0.5;1,1;technic_cnc_slope.png;slope; ]"..
 	"image_button[2,0.5;1,1;technic_cnc_slope_edge.png;slope_edge; ]"..
diff --git a/technic/machines/LV/solar_panel.lua b/technic/machines/LV/solar_panel.lua
index a06ddb8..c072b13 100644
--- a/technic/machines/LV/solar_panel.lua
+++ b/technic/machines/LV/solar_panel.lua
@@ -35,7 +35,8 @@ local run = function(pos, node)
 		local charge_to_give = math.floor((light + pos1.y) * 3)
 		charge_to_give = math.max(charge_to_give, 0)
 		charge_to_give = math.min(charge_to_give, 200)
-		meta:set_string("infotext", S("@1 Active (@2 EU)", machine_name, technic.pretty_num(charge_to_give)))
+		meta:set_string("infotext", S("@1 Active (@2)", machine_name,
+			technic.EU_string(charge_to_give)))
 		meta:set_int("LV_EU_supply", charge_to_give)
 	else
 		meta:set_string("infotext", S("%s Idle"):format(machine_name))
@@ -54,7 +55,7 @@ minetest.register_node("technic:solar_panel", {
 	active = false,
 	drawtype = "nodebox",
 	paramtype = "light",
-	is_ground_content = true,	
+	is_ground_content = true,
 	node_box = {
 		type = "fixed",
 		fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
diff --git a/technic/machines/MV/tool_workshop.lua b/technic/machines/MV/tool_workshop.lua
index 6679d1d..a220ac0 100644
--- a/technic/machines/MV/tool_workshop.lua
+++ b/technic/machines/MV/tool_workshop.lua
@@ -19,7 +19,7 @@ minetest.register_craft({
 local workshop_demand = {5000, 3500, 2000}
 
 local workshop_formspec =
-	"invsize[8,9;]"..
+	"size[8,9;]"..
 	"list[current_name;src;3,1;1,1;]"..
 	"label[0,0;"..S("%s Tool Workshop"):format("MV").."]"..
 	"list[current_name;upgrade1;1,3;1,1;]"..
diff --git a/technic/machines/MV/wind_mill.lua b/technic/machines/MV/wind_mill.lua
index 28a075d..9df12b9 100644
--- a/technic/machines/MV/wind_mill.lua
+++ b/technic/machines/MV/wind_mill.lua
@@ -60,7 +60,8 @@ local run = function(pos, node)
 	elseif check == true then
 		local power = math.min(pos.y * 100, 5000)
 		meta:set_int("MV_EU_supply", power)
-		meta:set_string("infotext", S("@1 (@2 EU)", machine_name, technic.pretty_num(power)))
+		meta:set_string("infotext", S("@1 (@2)", machine_name,
+			technic.EU_string(power)))
 	end
 	-- check == nil: assume nothing has changed
 end
diff --git a/technic/machines/other/constructor.lua b/technic/machines/other/constructor.lua
index 5847fdb..0a62a7c 100644
--- a/technic/machines/other/constructor.lua
+++ b/technic/machines/other/constructor.lua
@@ -99,7 +99,7 @@ local function make_on(mark, length)
 
 		if node.name == "technic:constructor_mk"..mark.."_off" then
 			technic.swap_node(pos, "technic:constructor_mk"..mark.."_on")
-			nodeupdate(pos)
+			minetest.check_for_falling(pos)
 			for i = 1, length do
 				place_pos = vector.add(place_pos, dir)
 				local place_node = minetest.get_node(place_pos)
@@ -113,7 +113,7 @@ local function make_off(mark)
 	return function(pos, node)
 		if node.name == "technic:constructor_mk"..mark.."_on" then
 			technic.swap_node(pos,"technic:constructor_mk"..mark.."_off")
-			nodeupdate(pos)
+			minetest.check_for_falling(pos)
 		end
 	end
 end
diff --git a/technic/machines/other/injector.lua b/technic/machines/other/injector.lua
index b34dd79..4fe78b2 100644
--- a/technic/machines/other/injector.lua
+++ b/technic/machines/other/injector.lua
@@ -55,7 +55,7 @@ minetest.register_craft({
 local function set_injector_formspec(meta)
 	local is_stack = meta:get_string("mode") == "whole stacks"
 	meta:set_string("formspec",
-		"invsize[8,9;]"..
+		"size[8,9;]"..
 		"item_image[0,0;1,1;technic:injector]"..
 		"label[1,0;"..S("Self-Contained Injector").."]"..
 		(is_stack and
diff --git a/technic/machines/power_monitor.lua b/technic/machines/power_monitor.lua
index 4d722a2..7e8b850 100644
--- a/technic/machines/power_monitor.lua
+++ b/technic/machines/power_monitor.lua
@@ -55,7 +55,7 @@ minetest.register_abm({
 			local demand = sw_meta:get_int("demand")
 			meta:set_string("infotext",
 					S("Power Monitor. Supply: @1 Demand: @2",
-					technic.pretty_num(supply), technic.pretty_num(demand)))
+					technic.EU_string(supply), technic.EU_string(demand)))
 		else
 			meta:set_string("infotext",S("Power Monitor Has No Network"))
 		end
diff --git a/technic/machines/register/alloy_recipes.lua b/technic/machines/register/alloy_recipes.lua
index bd09bd6..3aeacd5 100644
--- a/technic/machines/register/alloy_recipes.lua
+++ b/technic/machines/register/alloy_recipes.lua
@@ -13,7 +13,7 @@ end
 
 local recipes = {
 	{"technic:copper_dust 3",         "technic:tin_dust",           "technic:bronze_dust 4"},
-	{"default:copper_ingot 3",        "moreores:tin_ingot",         "default:bronze_ingot 4"},
+	{"default:copper_ingot 3",        "default:tin_ingot",          "default:bronze_ingot 4"},
 	{"technic:wrought_iron_dust",     "technic:coal_dust",          "technic:carbon_steel_dust", 3},
 	{"technic:wrought_iron_ingot",    "technic:coal_dust",          "technic:carbon_steel_ingot", 3},
 	{"technic:carbon_steel_dust",     "technic:coal_dust",          "technic:cast_iron_dust", 3},
diff --git a/technic/machines/register/battery_box.lua b/technic/machines/register/battery_box.lua
index 84e992c..d10b705 100644
--- a/technic/machines/register/battery_box.lua
+++ b/technic/machines/register/battery_box.lua
@@ -18,7 +18,7 @@ minetest.register_craft({
 	output = "technic:battery",
 	recipe = {
 		{"group:wood", "default:copper_ingot", "group:wood"},
-		{"group:wood", "moreores:tin_ingot",   "group:wood"},
+		{"group:wood", "default:tin_ingot",    "group:wood"},
 		{"group:wood", "default:copper_ingot", "group:wood"},
 	}
 })
@@ -255,8 +255,9 @@ function technic.register_battery_box(data)
 
 		local charge_percent = math.floor(current_charge / max_charge * 100)
 		meta:set_string("formspec", formspec..add_on_off_buttons(meta, ltier, charge_percent))
-		local infotext = S("@1 Battery Box: @2/@3", tier,
-				technic.pretty_num(current_charge), technic.pretty_num(max_charge))
+		local infotext = S("@1 Battery Box: @2 / @3", tier,
+				technic.EU_string(current_charge),
+				technic.EU_string(max_charge))
 		if eu_input == 0 then
 			infotext = S("%s Idle"):format(infotext)
 		end
diff --git a/technic/machines/register/generator.lua b/technic/machines/register/generator.lua
index 7805bf0..87ef6e7 100644
--- a/technic/machines/register/generator.lua
+++ b/technic/machines/register/generator.lua
@@ -35,7 +35,7 @@ function technic.register_generator(data)
 	for k, v in pairs(groups) do active_groups[k] = v end
 
 	local generator_formspec =
-		"invsize[8,9;]"..
+		"size[8,9;]"..
 		"label[0,0;"..S("Fuel-Fired %s Generator"):format(tier).."]"..
 		"list[current_name;src;3,1;1,1;]"..
 		"image[4,1;1,1;default_furnace_fire_bg.png]"..
diff --git a/technic/machines/register/grinder_recipes.lua b/technic/machines/register/grinder_recipes.lua
index fa55e7a..1f4047c 100644
--- a/technic/machines/register/grinder_recipes.lua
+++ b/technic/machines/register/grinder_recipes.lua
@@ -15,6 +15,7 @@ local recipes = {
 	{"default:desert_stone",       "default:desert_sand"},
 	{"default:gold_lump",          "technic:gold_dust 2"},
 	{"default:iron_lump",          "technic:wrought_iron_dust 2"},
+	{"default:tin_lump",           "technic:tin_dust 2"},
 	{"technic:chromium_lump",      "technic:chromium_dust 2"},
 	{"technic:uranium_lump",       "technic:uranium_dust 2"},
 	{"technic:zinc_lump",          "technic:zinc_dust 2"},
@@ -43,7 +44,6 @@ end
 if minetest.get_modpath("moreores") then
 	table.insert(recipes, {"moreores:mithril_lump",   "technic:mithril_dust 2"})
 	table.insert(recipes, {"moreores:silver_lump",    "technic:silver_dust 2"})
-	table.insert(recipes, {"moreores:tin_lump",       "technic:tin_dust 2"})
 end
 
 if minetest.get_modpath("gloopores") or minetest.get_modpath("glooptest") then
@@ -94,9 +94,9 @@ register_dust("Gold",            "default:gold_ingot")
 register_dust("Mithril",         "moreores:mithril_ingot")
 register_dust("Silver",          "moreores:silver_ingot")
 register_dust("Stainless Steel", "technic:stainless_steel_ingot")
-register_dust("Stone",            "default:stone")
+register_dust("Stone",           "default:stone")
 register_dust("Sulfur",          nil)
-register_dust("Tin",             "moreores:tin_ingot")
+register_dust("Tin",             "default:tin_ingot")
 register_dust("Wrought Iron",    "technic:wrought_iron_ingot")
 register_dust("Zinc",            "technic:zinc_ingot")
 if minetest.get_modpath("gloopores") or minetest.get_modpath("glooptest") then
diff --git a/technic/machines/register/machine_base.lua b/technic/machines/register/machine_base.lua
index 0c6a6b3..14cf998 100644
--- a/technic/machines/register/machine_base.lua
+++ b/technic/machines/register/machine_base.lua
@@ -44,7 +44,7 @@ function technic.register_base_machine(data)
 	for k, v in pairs(groups) do active_groups[k] = v end
 
 	local formspec =
-		"invsize[8,9;]"..
+		"size[8,9;]"..
 		"list[current_name;src;"..(4-input_size)..",1;"..input_size..",1;]"..
 		"list[current_name;dst;5,1;2,2;]"..
 		"list[current_player;main;0,5;8,4;]"..
diff --git a/technic/machines/register/solar_array.lua b/technic/machines/register/solar_array.lua
index 422bfcf..03f11d9 100644
--- a/technic/machines/register/solar_array.lua
+++ b/technic/machines/register/solar_array.lua
@@ -30,14 +30,15 @@ function technic.register_solar_array(data)
 			local charge_to_give = math.floor((light + pos.y) * data.power)
 			charge_to_give = math.max(charge_to_give, 0)
 			charge_to_give = math.min(charge_to_give, data.power * 50)
-			meta:set_string("infotext", S("@1 Active (@2 EU)", machine_name, technic.pretty_num(charge_to_give)))
+			meta:set_string("infotext", S("@1 Active (@2)", machine_name,
+				technic.EU_string(charge_to_give)))
 			meta:set_int(tier.."_EU_supply", charge_to_give)
 		else
 			meta:set_string("infotext", S("%s Idle"):format(machine_name))
 			meta:set_int(tier.."_EU_supply", 0)
 		end
 	end
-	
+
 	minetest.register_node("technic:solar_array_"..ltier, {
 		tiles = {"technic_"..ltier.."_solar_array_top.png",  "technic_"..ltier.."_solar_array_bottom.png",
 			 "technic_"..ltier.."_solar_array_side.png", "technic_"..ltier.."_solar_array_side.png",
diff --git a/technic/machines/supply_converter.lua b/technic/machines/supply_converter.lua
index 8527bcf..9202c4a 100644
--- a/technic/machines/supply_converter.lua
+++ b/technic/machines/supply_converter.lua
@@ -149,7 +149,9 @@ local run = function(pos, node, run_stage)
 		meta:set_int(from.."_EU_supply", 0)
 		meta:set_int(to.."_EU_demand", 0)
 		meta:set_int(to.."_EU_supply", input * remain)
-		meta:set_string("infotext", S("@1 (@2 @3 -> @4 @5)", machine_name, technic.pretty_num(input), from, technic.pretty_num(input * remain), to))
+		meta:set_string("infotext", S("@1 (@2 @3 -> @4 @5)", machine_name,
+			technic.EU_string(input), from,
+			technic.EU_string(input * remain), to))
 	else
 		meta:set_string("infotext", S("%s Has Bad Cabling"):format(machine_name))
 		if to then
diff --git a/technic/machines/switching_station.lua b/technic/machines/switching_station.lua
index 21d394b..d645847 100644
--- a/technic/machines/switching_station.lua
+++ b/technic/machines/switching_station.lua
@@ -361,9 +361,9 @@ minetest.register_abm({
 		end
 		--dprint("Total BA demand:"..BA_eu_demand)
 
-		meta:set_string("infotext",
-				S("@1. Supply: @2 Demand: @3",
-				machine_name, technic.pretty_num(PR_eu_supply), technic.pretty_num(RE_eu_demand)))
+		meta:set_string("infotext", S("@1. Supply: @2 Demand: @3",
+				machine_name, technic.EU_string(PR_eu_supply),
+				technic.EU_string(RE_eu_demand)))
 
 		-- If mesecon signal and power supply or demand changed then
 		-- send them via digilines.
diff --git a/technic/radiation.lua b/technic/radiation.lua
index 722b0ac..a4c49c6 100644
--- a/technic/radiation.lua
+++ b/technic/radiation.lua
@@ -54,6 +54,7 @@ local rad_resistance_node = {
 	["default:lava_source"] = 17,
 	["default:mese"] = 21,
 	["default:mossycobble"] = 15,
+	["default:tinblock"] = 37,
 	["pbj_pup:pbj_pup"] = 10000,
 	["pbj_pup:pbj_pup_candies"] = 10000,
 	["gloopblocks:rainbow_block_diagonal"] = 5000,
@@ -76,6 +77,7 @@ local rad_resistance_node = {
 	["default:stone_with_gold"] = 34,
 	["default:stone_with_iron"] = 20,
 	["default:stone_with_mese"] = 17,
+	["default:stone_with_tin"] = 19,
 	["default:stonebrick"] = 17,
 	["default:water_flowing"] = 2.8,
 	["default:water_source"] = 5.6,
@@ -141,10 +143,8 @@ local rad_resistance_node = {
 	["moreblocks:wood_tile_up"] = 1.7,
 	["moreores:mineral_mithril"] = 18,
 	["moreores:mineral_silver"] = 21,
-	["moreores:mineral_tin"] = 19,
 	["moreores:mithril_block"] = 26,
 	["moreores:silver_block"] = 53,
-	["moreores:tin_block"] = 37,
 	["snow:snow_brick"] = 2.8,
 	["technic:brass_block"] = 43,
 	["technic:carbon_steel_block"] = 40,
diff --git a/technic/tools/mining_drill.lua b/technic/tools/mining_drill.lua
index bc426e7..1cf7491 100644
--- a/technic/tools/mining_drill.lua
+++ b/technic/tools/mining_drill.lua
@@ -6,7 +6,7 @@ local S = technic.getter
 minetest.register_craft({
 	output = 'technic:mining_drill',
 	recipe = {
-		{'moreores:tin_ingot',            'technic:diamond_drill_head', 'moreores:tin_ingot'},
+		{'default:tin_ingot',             'technic:diamond_drill_head', 'default:tin_ingot'},
 		{'technic:stainless_steel_ingot', 'technic:motor',              'technic:stainless_steel_ingot'},
 		{'',                              'technic:red_energy_crystal', 'default:copper_ingot'},
 	}
diff --git a/technic/tools/mining_lasers.lua b/technic/tools/mining_lasers.lua
index ef1eecb..6015e5a 100644
--- a/technic/tools/mining_lasers.lua
+++ b/technic/tools/mining_lasers.lua
@@ -4,43 +4,43 @@ local mining_lasers_list = {
 	{"2", 14, 200000, 2000},
 	{"3", 21, 650000, 3000},
 }
+local allow_entire_discharging = true
 
 local S = technic.getter
 
 minetest.register_craft({
-	output = 'technic:laser_mk1',
+	output = "technic:laser_mk1",
 	recipe = {
-		{'default:diamond', 'technic:brass_ingot',        'default:obsidian_glass'},
-		{'',                'technic:brass_ingot',        'technic:red_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:brass_ingot",        "default:obsidian_glass"},
+		{"",                "technic:brass_ingot",        "technic:red_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 minetest.register_craft({
-	output = 'technic:laser_mk2',
+	output = "technic:laser_mk2",
 	recipe = {
-		{'default:diamond', 'technic:carbon_steel_ingot', 'technic:laser_mk1'},
-		{'',                'technic:carbon_steel_ingot', 'technic:green_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:carbon_steel_ingot", "technic:laser_mk1"},
+		{"",                "technic:carbon_steel_ingot", "technic:green_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 minetest.register_craft({
-	output = 'technic:laser_mk3',
+	output = "technic:laser_mk3",
 	recipe = {
-		{'default:diamond', 'technic:carbon_steel_ingot', 'technic:laser_mk2'},
-		{'',                'technic:carbon_steel_ingot', 'technic:blue_energy_crystal'},
-		{'',                '',                           'default:copper_ingot'},
+		{"default:diamond", "technic:carbon_steel_ingot", "technic:laser_mk2"},
+		{"",                "technic:carbon_steel_ingot", "technic:blue_energy_crystal"},
+		{"",                "",                           "default:copper_ingot"},
 	}
 })
 
 local function laser_node(pos, node, player)
 	local def = minetest.registered_nodes[node.name]
-	if def and def.liquidtype ~= "none" then
+	if def.liquidtype ~= "none" and def.buildable_to then
 		minetest.remove_node(pos)
 		minetest.add_particle({
 			pos = pos,
-			velocity = {x=0, y=2, z=0},
-			acceleration = {x=0, y=-1, z=0},
-			expirationtime = 1.5,
+			velocity = {x = 0, y = 1.5 + math.random(), z = 0},
+			acceleration = {x = 0, y = -1, z = 0},
 			size = 6 + math.random() * 2,
 			texture = "smoke_puff.png^[transform" .. math.random(0, 7),
 		})
@@ -49,11 +49,15 @@ local function laser_node(pos, node, player)
 	minetest.node_dig(pos, node, player)
 end
 
-local no_destroy = {
-	["air"] = true,
-	["default:lava_source"] = true,
-	["default:lava_flowing"] = true,
-}
+local keep_node = {air = true}
+local function can_keep_node(name)
+	if keep_node[name] ~= nil then
+		return keep_node[name]
+	end
+	keep_node[name] = minetest.get_item_group(name, "hot") ~= 0
+	return keep_node[name]
+end
+
 local function laser_shoot(player, range, particle_texture, sound)
 	local player_pos = player:getpos()
 	local player_name = player:get_player_name()
@@ -61,12 +65,12 @@ local function laser_shoot(player, range, particle_texture, sound)
 
 	local start_pos = vector.new(player_pos)
 	-- Adjust to head height
-	start_pos.y = start_pos.y + 1.6
+	start_pos.y = start_pos.y + (player:get_properties().eye_height or 1.625)
 	minetest.add_particle({
-		pos = startpos,
+		pos = start_pos,
 		velocity = dir,
 		acceleration = vector.multiply(dir, 50),
-		expirationtime = range / 11,
+		expirationtime = (math.sqrt(1 + 100 * (range + 0.4)) - 1) / 50,
 		size = 1,
 		texture = particle_texture .. "^[transform" .. math.random(0, 7),
 	})
@@ -76,42 +80,48 @@ local function laser_shoot(player, range, particle_texture, sound)
 			minetest.record_protection_violation(pos, player_name)
 			break
 		end
-		local node = minetest.get_node_or_nil(pos)
-		if not node then
+		local node = minetest.get_node(pos)
+		if node.name == "ignore"
+				or not minetest.registered_nodes[node.name] then
 			break
 		end
-		if not no_destroy[node.name] then
+		if not can_keep_node(node.name) then
 			laser_node(pos, node, player)
 		end
 	end
 end
 
-
 for _, m in pairs(mining_lasers_list) do
 	technic.register_power_tool("technic:laser_mk"..m[1], m[3])
 	minetest.register_tool("technic:laser_mk"..m[1], {
 		description = S("Mining Laser Mk%d"):format(m[1]),
 		inventory_image = "technic_mining_laser_mk"..m[1]..".png",
+		range = 0,
 		stack_max = 1,
 		wear_represents = "technic_RE_charge",
 		on_refill = technic.refill_RE_charge,
 		on_use = function(itemstack, user)
 			local meta = minetest.deserialize(itemstack:get_metadata())
-			if not meta or not meta.charge then
+			if not meta or not meta.charge or meta.charge == 0 then
 				return
 			end
 
-			-- If there's enough charge left, fire the laser
-			if meta.charge >= m[4] then
-				laser_shoot(user, m[2], "technic_laser_beam_mk"..m[1]..".png", "technic_laser_mk"..m[1])
-				if not technic.creative_mode then
-					meta.charge = meta.charge - m[4]
-					technic.set_RE_wear(itemstack, meta.charge, m[3])
-					itemstack:set_metadata(minetest.serialize(meta))
+			local range = m[2]
+			if meta.charge < m[4] then
+				if not allow_entire_discharging then
+					return
 				end
+				-- If charge is too low, give the laser a shorter range
+				range = range * meta.charge / m[4]
+			end
+			laser_shoot(user, range, "technic_laser_beam_mk" .. m[1] .. ".png",
+				"technic_laser_mk" .. m[1])
+			if not technic.creative_mode then
+				meta.charge = math.max(meta.charge - m[4], 0)
+				technic.set_RE_wear(itemstack, meta.charge, m[3])
+				itemstack:set_metadata(minetest.serialize(meta))
 			end
 			return itemstack
 		end,
 	})
 end
-
diff --git a/technic_chests/init.lua b/technic_chests/init.lua
index 3565987..6b1a1b2 100644
--- a/technic_chests/init.lua
+++ b/technic_chests/init.lua
@@ -15,3 +15,11 @@ dofile(modpath.."/silver_chest.lua")
 dofile(modpath.."/gold_chest.lua")
 dofile(modpath.."/mithril_chest.lua")
 
+minetest.register_lbm({
+	name = "technic_chests:fix_wooden_chests",
+	nodenames = {"default:chest"},
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		meta:set_string("formspec", "")
+	end
+})
diff --git a/technic_worldgen/oregen.lua b/technic_worldgen/oregen.lua
index 8e7af91..fb7ac84 100644
--- a/technic_worldgen/oregen.lua
+++ b/technic_worldgen/oregen.lua
@@ -1,132 +1,157 @@
-local uranium_params = {offset = 0, scale = 1, spread = {x = 100, y = 100, z = 100}, seed = 420, octaves = 3, persist = 0.7}
+local uranium_params = {
+	offset = 0,
+	scale = 1,
+	spread = {x = 100, y = 100, z = 100},
+	seed = 420,
+	octaves = 3,
+	persist = 0.7
+}
 local uranium_threshold = 0.55
 
-local chromium_params = {offset = 0, scale = 1, spread = {x = 100, y = 100, z = 100}, seed = 421, octaves = 3, persist = 0.7}
+local chromium_params = {
+	offset = 0,
+	scale = 1,
+	spread = {x = 100, y = 100, z = 100},
+	seed = 421,
+	octaves = 3,
+	persist = 0.7
+}
 local chromium_threshold = 0.55
 
-local zinc_params = {offset = 0, scale = 1, spread = {x = 100, y = 100, z = 100}, seed = 422, octaves = 3, persist = 0.7}
+local zinc_params = {
+	offset = 0,
+	scale = 1,
+	spread = {x = 100, y = 100, z = 100},
+	seed = 422,
+	octaves = 3,
+	persist = 0.7
+}
 local zinc_threshold = 0.5
 
-local lead_params = {offset = 0, scale = 1, spread = {x = 100, y = 100, z = 100}, seed = 423, octaves = 3, persist = 0.7}
+local lead_params = {
+	offset = 0,
+	scale = 1,
+	spread = {x = 100, y = 100, z = 100},
+	seed = 423,
+	octaves = 3,
+	persist = 0.7
+}
 local lead_threshold = 0.3
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_uranium",
-	wherein          = "default:stone",
-	clust_scarcity   = 8*8*8,
-	clust_num_ores   = 4,
-	clust_size       = 3,
-	y_min       = -300,
-	y_max       = -80,
-	noise_params     = uranium_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_uranium",
+	wherein = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 4,
+	clust_size = 3,
+	y_min = -300,
+	y_max = -80,
+	noise_params = uranium_params,
 	noise_threshold = uranium_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_chromium",
-	wherein          = "default:stone",
-	clust_scarcity   = 8*8*8,
-	clust_num_ores   = 2,
-	clust_size       = 3,
-	y_min       = -200,
-	y_max       = -100,
-	noise_params     = chromium_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_chromium",
+	wherein = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 2,
+	clust_size = 3,
+	y_min = -200,
+	y_max = -100,
+	noise_params = chromium_params,
 	noise_threshold = chromium_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_chromium",
-	wherein          = "default:stone",
-	clust_scarcity   = 6*6*6,
-	clust_num_ores   = 2,
-	clust_size       = 3,
-	y_min       = -31000,
-	y_max       = -200,
-	flags            = "absheight",
-	noise_params     = chromium_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_chromium",
+	wherein = "default:stone",
+	clust_scarcity = 6*6*6,
+	clust_num_ores = 2,
+	clust_size = 3,
+	y_min = -31000,
+	y_max = -200,
+	flags = "absheight",
+	noise_params = chromium_params,
 	noise_threshold = chromium_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_zinc",
-	wherein          = "default:stone",
-	clust_scarcity   = 8*8*8,
-	clust_num_ores   = 5,
-	clust_size       = 7,
-	y_min       = -32,
-	y_max       = 2,
-	noise_params     = zinc_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_zinc",
+	wherein = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 5,
+	clust_size = 7,
+	y_min = -32,
+	y_max = 2,
+	noise_params = zinc_params,
 	noise_threshold = zinc_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_zinc",
-	wherein          = "default:stone",
-	clust_scarcity   = 6*6*6,
-	clust_num_ores   = 4,
-	clust_size       = 3,
-	y_min       = -31000,
-	y_max       = -32,
-	flags            = "absheight",
-	noise_params     = zinc_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_zinc",
+	wherein = "default:stone",
+	clust_scarcity = 6*6*6,
+	clust_num_ores = 4,
+	clust_size = 3,
+	y_min = -31000,
+	y_max = -32,
+	flags = "absheight",
+	noise_params = zinc_params,
 	noise_threshold = zinc_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_lead",
-	wherein          = "default:stone",
-	clust_scarcity   = 9*9*9,
-	clust_num_ores   = 5,
-	clust_size       = 3,
-	y_min       = -16,
-	y_max       = 16,
-	noise_params     = lead_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_lead",
+	wherein = "default:stone",
+	clust_scarcity = 9*9*9,
+	clust_num_ores = 5,
+	clust_size = 3,
+	y_min = -16,
+	y_max = 16,
+	noise_params = lead_params,
 	noise_threshold = lead_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_lead",
-	wherein          = "default:stone",
-	clust_scarcity   = 8*8*8,
-	clust_num_ores   = 5,
-	clust_size       = 3,
-	y_min       = -128,
-	y_max       = -16,
-	noise_params     = lead_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_lead",
+	wherein = "default:stone",
+	clust_scarcity = 8*8*8,
+	clust_num_ores = 5,
+	clust_size = 3,
+	y_min = -128,
+	y_max = -16,
+	noise_params = lead_params,
 	noise_threshold = lead_threshold,
 })
 
 minetest.register_ore({
-	ore_type         = "scatter",
-	ore              = "technic:mineral_lead",
-	wherein          = "default:stone",
-	clust_scarcity   = 6*6*6,
-	clust_num_ores   = 5,
-	clust_size       = 3,
-	y_min       = -31000,
-	y_max       = -128,
-	flags            = "absheight",
-	noise_params     = lead_params,
+	ore_type = "scatter",
+	ore = "technic:mineral_lead",
+	wherein = "default:stone",
+	clust_scarcity = 6*6*6,
+	clust_num_ores = 5,
+	clust_size = 3,
+	y_min = -31000,
+	y_max = -128,
+	flags = "absheight",
+	noise_params = lead_params,
 	noise_threshold = lead_threshold,
 })
 
 -- Sulfur
 local sulfur_buf = {}
-local sulfur_noise= nil
+local sulfur_noise
 
-minetest.register_on_generated(function(minp, maxp, seed)
+minetest.register_on_generated(function(minp, maxp)
 	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
-	local a = VoxelArea:new{
-		MinEdge = {x = emin.x, y = emin.y, z = emin.z},
-		MaxEdge = {x = emax.x, y = emax.y, z = emax.z},
-	}
+	local a = VoxelArea:new({MinEdge=emin, MaxEdge=emax})
 	local data = vm:get_data(sulfur_buf)
 	local pr = PseudoRandom(17 * minp.x + 42 * minp.y + 101 * minp.z)
 	sulfur_noise = sulfur_noise or minetest.get_perlin(9876, 3, 0.5, 100)
@@ -141,17 +166,20 @@ minetest.register_on_generated(function(minp, maxp, seed)
 	for y = minp.y + math.floor(grid_size / 2), maxp.y, grid_size do
 	for z = minp.z + math.floor(grid_size / 2), maxp.z, grid_size do
 		local c = data[a:index(x, y, z)]
-		if (c == c_lava or c == c_lava_flowing) and sulfur_noise:get3d({x = x, y = z, z = z}) >= 0.4 then
-			for xx = math.max(minp.x, x - grid_size), math.min(maxp.x, x + grid_size) do
-			for yy = math.max(minp.y, y - grid_size), math.min(maxp.y, y + grid_size) do
-			for zz = math.max(minp.z, z - grid_size), math.min(maxp.z, z + grid_size) do
-				local i = a:index(xx, yy, zz)
+		if (c == c_lava or c == c_lava_flowing)
+		and sulfur_noise:get_3d({x = x, y = z, z = z}) >= 0.4 then
+			for i in a:iter(
+				math.max(minp.x, x - grid_size),
+				math.max(minp.y, y - grid_size),
+				math.max(minp.z, z - grid_size),
+				math.min(maxp.x, x + grid_size),
+				math.min(maxp.y, y + grid_size),
+				math.min(maxp.z, z + grid_size)
+			) do
 				if data[i] == c_stone and pr:next(1, 10) <= 7 then
 					data[i] = c_sulfur
 				end
 			end
-			end
-			end
 		end
 	end
 	end
@@ -163,32 +191,37 @@ end)
 
 
 if technic.config:get_bool("enable_marble_generation") then
-minetest.register_ore({
-	ore_type       = "sheet",
-	ore            = "technic:marble",
-	wherein        = "default:stone",
-	clust_scarcity = 1,
-	clust_num_ores = 1,
-	clust_size     = 3,
-	y_min     = -31000,
-	y_max     = -50,
-	noise_threshold = 0.4,
-	noise_params = {offset=0, scale=15, spread={x=150, y=150, z=150}, seed=23, octaves=3, persist=0.70}
-})
+	minetest.register_ore({
+		ore_type = "sheet",
+		ore = "technic:marble",
+		wherein = "default:stone",
+		clust_scarcity = 1,
+		clust_num_ores = 1,
+		clust_size = 3,
+		y_min = -31000,
+		y_max = -50,
+		noise_threshold = 0.4,
+		noise_params = {
+			offset = 0, scale = 15, spread = {x = 150, y = 150, z = 150},
+			seed = 23, octaves = 3, persist = 0.70
+		}
+	})
 end
 
 if technic.config:get_bool("enable_granite_generation") then
-minetest.register_ore({
-	ore_type       = "sheet",
-	ore            = "technic:granite",
-	wherein        = "default:stone",
-	clust_scarcity = 1,
-	clust_num_ores = 1,
-	clust_size     = 4,
-	y_min     = -31000,
-	y_max     = -150,
-	noise_threshold = 0.4,
-	noise_params = {offset=0, scale=15, spread={x=130, y=130, z=130}, seed=24, octaves=3, persist=0.70}
-})
+	minetest.register_ore({
+		ore_type = "sheet",
+		ore = "technic:granite",
+		wherein = "default:stone",
+		clust_scarcity = 1,
+		clust_num_ores = 1,
+		clust_size = 4,
+		y_min = -31000,
+		y_max = -150,
+		noise_threshold = 0.4,
+		noise_params = {
+			offset = 0, scale = 15, spread = {x = 130, y = 130, z = 130},
+			seed = 24, octaves = 3, persist = 0.70
+		}
+	})
 end
-
diff --git a/wrench/init.lua b/wrench/init.lua
index bae77aa..adb80c9 100644
--- a/wrench/init.lua
+++ b/wrench/init.lua
@@ -120,7 +120,7 @@ minetest.register_tool("wrench:wrench", {
 			return
 		end
 		local meta = minetest.get_meta(pos)
-		if def.owned then
+		if def.owned and not minetest.check_player_privs(placer, "protection_bypass") then
 			local owner = meta:get_string("owner")
 			if owner and owner ~= player_name then
 				minetest.log("action", player_name..