diff --git a/code/game/objects/structures.dm b/code/game/objects/structures.dm
index 28a49acdbf8..8b0d5add1b7 100644
--- a/code/game/objects/structures.dm
+++ b/code/game/objects/structures.dm
@@ -5,7 +5,6 @@
 	var/climbable
 	var/climb_delay = 3.5 SECONDS
 	var/breakable
-	var/parts
 	var/list/climbers = list()
 
 	var/list/connections
@@ -13,11 +12,6 @@
 	var/list/blend_objects = newlist() // Objects which to blend with
 	var/list/noblend_objects = newlist() //Objects to avoid blending with (such as children of listed blend objects.
 
-/obj/structure/Destroy()
-	if(parts)
-		new parts(loc)
-	. = ..()
-
 /obj/structure/attack_hand(mob/user)
 	if(breakable)
 		if(HULK in user.mutations)
diff --git a/code/game/world.dm b/code/game/world.dm
index bdc374b70d2..25cc1edcb94 100644
--- a/code/game/world.dm
+++ b/code/game/world.dm
@@ -407,15 +407,17 @@ GLOBAL_LIST(topic_status_cache)
 
 // Things to do when a new z-level was just made.
 /world/proc/max_z_changed()
-	if(!istype(GLOB.players_by_zlevel, /list))
-		GLOB.players_by_zlevel = new /list(world.maxz, 0)
+	assert_players_by_zlevel_list()
+
+/proc/assert_players_by_zlevel_list()
+	if(!islist(GLOB.players_by_zlevel))
+		GLOB.players_by_zlevel = list()
 	while(GLOB.players_by_zlevel.len < world.maxz)
-		GLOB.players_by_zlevel.len++
-		GLOB.players_by_zlevel[GLOB.players_by_zlevel.len] = list()
+		GLOB.players_by_zlevel[++GLOB.players_by_zlevel.len] = list()
 
 // Call this to make a new blank z-level, don't modify maxz directly.
 /world/proc/increment_max_z()
-	maxz++
+	. = ++maxz
 	max_z_changed()
 
 //! LOG SHUNTER STUFF, LEAVE THIS ALONE
diff --git a/code/modules/admin/verbs/smite_vr.dm b/code/modules/admin/verbs/smite_vr.dm
index 85425bd77de..0f0a61fe4b4 100644
--- a/code/modules/admin/verbs/smite_vr.dm
+++ b/code/modules/admin/verbs/smite_vr.dm
@@ -145,7 +145,7 @@ var/redspace_abduction_z
 	if(!redspace_abduction_z)
 		redspace_abduction_z = -1
 		to_chat(user,"<span class='warning'>This is the first use of the verb this shift, it will take a minute to configure the abduction z-level. It will be z[world.maxz+1].</span>")
-		var/z = ++world.maxz
+		var/z = world.increment_max_z()
 		var/area/areaInstance = new /area/redspace_abduction(null)
 		areaInstance.addSorted()
 		for(var/x = 1 to world.maxx)
diff --git a/code/modules/modular_computers/file_system/programs/engineering/rcon_console.dm b/code/modules/modular_computers/file_system/programs/engineering/rcon_console.dm
index f0b9a2b565c..7c7f6bdfff2 100644
--- a/code/modules/modular_computers/file_system/programs/engineering/rcon_console.dm
+++ b/code/modules/modular_computers/file_system/programs/engineering/rcon_console.dm
@@ -13,6 +13,8 @@
 	usage_flags = PROGRAM_LAPTOP | PROGRAM_CONSOLE
 	size = 19
 
+GLOBAL_LIST_EMPTY(rcon_nano_modules)
+
 /datum/nano_module/rcon
 	name = "Power RCON"
 	var/list/known_SMESs = null
@@ -22,6 +24,14 @@
 	var/hide_SMES_details = 0
 	var/hide_breakers = 0
 
+/datum/nano_module/rcon/New()
+	. = ..()
+	GLOB.rcon_nano_modules += src
+
+/datum/nano_module/rcon/Destroy()
+	. = ..()
+	GLOB.rcon_nano_modules -= src
+
 /datum/nano_module/rcon/nano_ui_interact(mob/user, ui_key = "rcon", datum/nanoui/ui=null, force_open=1, var/datum/topic_state/state = default_state)
 	FindDevices() // Update our devices list
 	var/list/data = host.initial_data()
diff --git a/code/modules/power/smes/smes.dm b/code/modules/power/smes/smes.dm
index d0e45d53be8..e096ae810b3 100644
--- a/code/modules/power/smes/smes.dm
+++ b/code/modules/power/smes/smes.dm
@@ -97,7 +97,6 @@ GLOBAL_LIST_EMPTY(smeses)
 	GLOB.smeses -= src
 	return ..()
 
-
 /obj/machinery/power/smes/disconnect_terminal()
 	if(terminal)
 		terminal.master = null
diff --git a/code/modules/power/smes/smes_construction.dm b/code/modules/power/smes/smes_construction.dm
index caa84d0d22f..ef58d0a8188 100644
--- a/code/modules/power/smes/smes_construction.dm
+++ b/code/modules/power/smes/smes_construction.dm
@@ -59,9 +59,8 @@
 	cur_coils = 3
 
 /obj/machinery/power/smes/buildable/Destroy()
-	qdel(wires)
-	wires = null
-	for(var/datum/nano_module/rcon/R in world)
+	QDEL_NULL(wires)
+	for(var/datum/nano_module/rcon/R in GLOB.rcon_nano_modules)
 		R.FindDevices()
 	return ..()