diff --git a/code/WorkInProgress/mining.dm b/code/WorkInProgress/mining.dm
index 82303a69c99..6945b201d44 100644
--- a/code/WorkInProgress/mining.dm
+++ b/code/WorkInProgress/mining.dm
@@ -2525,6 +2525,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "materials=4"
+	perunit = 2000
 
 /obj/item/stack/sheet/gold/New()
 	pixel_x = rand(0,4)-4
@@ -2539,6 +2540,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "materials=3"
+	perunit = 2000
 
 /obj/item/stack/sheet/silver/New()
 	pixel_x = rand(0,4)-4
@@ -2552,6 +2554,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	w_class = 3.0
 	throw_range = 3
 	origin_tech = "materials=6"
+	perunit = 1000
 
 /obj/item/stack/sheet/diamond/New()
 	pixel_x = rand(0,4)-4
@@ -2566,6 +2569,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "materials=5"
+	perunit = 2000
 
 /obj/item/stack/sheet/enruranium
 	name = "Enriched Uranium block"
@@ -2576,6 +2580,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "materials=5"
+	perunit = 1000
 
 /obj/item/stack/sheet/plasma
 	name = "solid plasma"
@@ -2586,6 +2591,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "plasmatech=2;materials=2"
+	perunit = 2000
 
 /obj/item/stack/sheet/clown
 	name = "bananium"
@@ -2596,6 +2602,7 @@ var/list/datum/material_recipe/MATERIAL_RECIPES = list(
 	throw_speed = 3
 	throw_range = 3
 	origin_tech = "materials=4"
+	perunit = 2000
 
 /obj/item/stack/sheet/clown/New()
 	pixel_x = rand(0,4)-4
diff --git a/code/defines/obj.dm b/code/defines/obj.dm
index 2dc241d3723..561e54218cd 100644
--- a/code/defines/obj.dm
+++ b/code/defines/obj.dm
@@ -898,6 +898,7 @@
 	flags = FPRINT | TABLEPASS
 	w_class = 3.0
 	max_amount = 50
+	var/perunit = 3750
 
 /obj/item/stack/sheet/glass
 	name = "glass"
diff --git a/code/game/mecha/mech_fabricator.dm b/code/game/mecha/mech_fabricator.dm
index 9c7f1bcbf23..c2c8c6407b6 100644
--- a/code/game/mecha/mech_fabricator.dm
+++ b/code/game/mecha/mech_fabricator.dm
@@ -225,25 +225,25 @@
 		var/amnt
 		if(istype(W, /obj/item/stack/sheet/gold))
 			material = "gold"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/silver))
 			material = "silver"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/diamond))
 			material = "diamond"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/plasma))
 			material = "plasma"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/metal))
 			material = "metal"
-			amnt = "m_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/glass))
 			material = "glass"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else if(istype(W, /obj/item/stack/sheet/clown))
 			material = "bananium"
-			amnt = "g_amt"
+			amnt = W:perunit
 		else
 			return ..()
 
@@ -257,7 +257,7 @@
 			spawn(10)
 				if(W && W.amount)
 					while(src.resources[material] < res_max_amount && W)
-						src.resources[material] += W.vars[amnt]
+						src.resources[material] += amnt
 						W.use(1)
 						count++
 					flick("mechfab2", src)