Screw commit history.

code/modules/mining/machine_stacking.dm

@@ -86,6 +86,11 @@
 	proximity_monitor = new(src, 1)
 	materials = AddComponent(/datum/component/remote_materials, "stacking", mapload, FALSE, mapload && force_connect)
 
+/obj/machinery/mineral/stacking_machine/Destroy()
+	CONSOLE = null
+	materials = null
+	return ..()
+
 /obj/machinery/mineral/stacking_machine/HasProximity(atom/movable/AM)
 	if(istype(AM, /obj/item/stack/sheet) && AM.loc == get_step(src, input_dir))
 		process_sheet(AM)
@@ -107,9 +112,9 @@
 	qdel(inp)
 
 	if(materials.silo && !materials.on_hold()) //Dump the sheets to the silo
-		var/matlist = storage.materials & materials.mat_container.materials
+		var/matlist = storage.custom_materials & materials.mat_container.materials
 		if (length(matlist))
-			var/inserted = materials.mat_container.insert_stack(storage)
+			var/inserted = materials.mat_container.insert_item(storage)
 			materials.silo_log(src, "collected", inserted, "sheets", matlist)
 			if (QDELETED(storage))
 				stack_list -= key