diff --git a/technic/config.lua b/technic/config.lua
index 5108475..a1d3777 100644
--- a/technic/config.lua
+++ b/technic/config.lua
@@ -8,7 +8,7 @@ local defaults = {
 	enable_flashlight = "false",
 	enable_wind_mill = "false",
 	enable_frames = "false",
-	enable_corium_griefing = "false",
+	enable_corium_griefing = "true",
 	enable_radiation_protection = "true",
 	enable_entity_radiation_damage = "true",
 	enable_longterm_radiation_damage = "true",
diff --git a/technic/machines/switching_station.lua b/technic/machines/switching_station.lua
index d645847..7f5cf31 100644
--- a/technic/machines/switching_station.lua
+++ b/technic/machines/switching_station.lua
@@ -234,6 +234,7 @@ minetest.register_abm({
 	chance     = 1,
 	action = function(pos, node, active_object_count, active_object_count_wider)
 		if not technic.powerctrl_state then return end
+		local t0 	       = minetest.get_us_time()
 		local meta             = minetest.get_meta(pos)
 		local meta1            = nil
 		local pos1             = {}
@@ -444,6 +445,12 @@ minetest.register_abm({
 			meta1:set_int(eu_input_str, 0)
 		end
 
+		local t1 = minetest.get_us_time()
+		local diff = t1 - t0
+		if diff > 100000 then -- 100ms
+			minetest.log("warning", "[technic] switching station abm took " .. diff .. " us at " .. minetest.pos_to_string(pos))
+		end
+
 	end,
 })