diff --git a/code/__DEFINES/maths.dm b/code/__DEFINES/maths.dm
index b6d1b771..cfb90f13 100644
--- a/code/__DEFINES/maths.dm
+++ b/code/__DEFINES/maths.dm
@@ -217,3 +217,12 @@
 
 #define RULE_OF_THREE(a, b, x) ((a*x)/b)
 // )
+
+#define MANHATTAN_DISTANCE(a, b) (abs(a.x - b.x) + abs(a.y - b.y))
+
+#define LOGISTIC_FUNCTION(L,k,x,x_0) (L/(1+(NUM_E**(-k*(x-x_0)))))
+
+/// Make sure something is a boolean TRUE/FALSE 1/0 value, since things like bitfield & bitflag doesn't always give 1s and 0s.
+#define FORCE_BOOLEAN(x) ((x)? TRUE : FALSE)
+
+#define TILES_TO_PIXELS(tiles)			(tiles * PIXELS)
diff --git a/code/modules/atmospherics/machinery/components/binary_devices/circulator.dm b/code/modules/atmospherics/machinery/components/binary_devices/circulator.dm
index 0d9b2a64..9fd0850f 100644
--- a/code/modules/atmospherics/machinery/components/binary_devices/circulator.dm
+++ b/code/modules/atmospherics/machinery/components/binary_devices/circulator.dm
@@ -89,6 +89,7 @@
 	if(!panel_open)
 		return
 	anchored = !anchored
+	move_resist = anchored? INFINITY : 100
 	I.play_tool_sound(src)
 	if(generator)
 		disconnectFromGenerator()
diff --git a/code/modules/cargo/packs/engine.dm b/code/modules/cargo/packs/engine.dm
index fd5c711b..44eb0ad5 100644
--- a/code/modules/cargo/packs/engine.dm
+++ b/code/modules/cargo/packs/engine.dm
@@ -169,12 +169,22 @@
 	crate_name = "tesla generator crate"
 
 /datum/supply_pack/engine/teg
-	name = "Thermoelectric Generator"
-	desc = "Contains your very own Thermoelectric Generator. Time to turn cargo into a blazing hellfire, perhaps?"
-	cost = 4000
-	contains = list(/obj/machinery/power/generator)
+	name = "Thermoelectric Generator Assembly"
+	desc = "Contains your very own Thermoelectric Generator Assembly. Time to turn cargo into a blazing hellfire, perhaps?"
+	cost = 3000
+	contains = list(/obj/item/paper/teg,
+					/obj/item/circuitboard/machine/generator,
+					/obj/item/circuitboard/machine/circulator,
+					/obj/item/circuitboard/machine/circulator,
+					/obj/item/stack/cable_coil,
+					/obj/item/stack/sheet/metal/twenty)
 	crate_name = "thermoelectric generator crate"
 
+/obj/item/paper/teg
+	info = "*The seemingly useful notes have been scribbled over with red and black crayon. Hmm.*"
+	name = "TEG Instructions"
+	color = "red"
+
 /datum/supply_pack/engine/energy_harvester
 	name = "Energy Harvesting Module"
 	desc = "A Device which upon connection to a node, will harvest the energy and send it to engineerless stations in return for credits, derived from a syndicate powersink model."
diff --git a/code/modules/power/generator.dm b/code/modules/power/generator.dm
index 14d2dbaa..c2a67735 100644
--- a/code/modules/power/generator.dm
+++ b/code/modules/power/generator.dm
@@ -89,7 +89,7 @@
 				var/energy_transfer = delta_temperature*hot_air_heat_capacity*cold_air_heat_capacity/(hot_air_heat_capacity+cold_air_heat_capacity)
 
 				var/heat = energy_transfer*(1-efficiency)
-				lastgen += energy_transfer*efficiency
+				lastgen += LOGISTIC_FUNCTION(500000,0.0009,delta_temperature,10000)
 
 				hot_air.temperature = hot_air.temperature - energy_transfer/hot_air_heat_capacity
 				cold_air.temperature = cold_air.temperature + heat/cold_air_heat_capacity