diff --git a/src/Dodge/Creature/Impulse/UseItem.hs b/src/Dodge/Creature/Impulse/UseItem.hs
index 0cd6ba3a6..5cd0be93e 100644
--- a/src/Dodge/Creature/Impulse/UseItem.hs
+++ b/src/Dodge/Creature/Impulse/UseItem.hs
@@ -26,17 +26,17 @@ useItemLoc cr loc pt w
     | HeldPlatformSF <- sf
       , fromMaybe False $ loc ^? locLDT . ldtValue . _1 . itLocation . ilIsAttached
       , Aiming{} <- cr ^. crStance . posture =
-        return $ gadgetEffect pt loc cr w
+        return $ gadgetEffect pt (locLDTToLocDT loc) cr w
     | LaserWeaponSF <- sf
       , fromMaybe False $ loc ^? locLDT . ldtValue . _1 . itLocation . ilIsAttached
       , Aiming{} <- cr ^. crStance . posture =
-        return $ gadgetEffect pt loc cr w
+        return $ gadgetEffect pt (locLDTToLocDT loc) cr w
     | GadgetPlatformSF <- sf =
-        return $ gadgetEffect pt loc cr w
+        return $ gadgetEffect pt (locLDTToLocDT loc) cr w
     | UnderBarrelPlatformSF <- sf
       , fromMaybe False $ loc ^? locLDT . ldtValue . _1 . itLocation . ilIsAttached
       , Aiming{} <- cr ^. crStance . posture =
-        return $ gadgetEffect pt loc cr w
+        return $ gadgetEffect pt (locLDTToLocDT loc) cr w
     | RemoteDetonatorSF <- sf
       , pt == InitialPress =
         return $ activateDetonator ldt w
diff --git a/src/Dodge/Creature/State.hs b/src/Dodge/Creature/State.hs
index 7af9cebe1..128febb61 100644
--- a/src/Dodge/Creature/State.hs
+++ b/src/Dodge/Creature/State.hs
@@ -153,7 +153,7 @@ invRootItemEffs cr =
 invItemLocUpdate :: Creature -> LocationLDT ItemLink OItem -> World -> World
 invItemLocUpdate cr loc w = doAnyEquipmentEffect loc cr $ case itm ^. itType of
     ATTACH BULLETSYNTH -> trySynthBullet loc w
-    EQUIP WRIST_ECG | haspulse -> tryUseParent loc w
+    EQUIP WRIST_ECG | haspulse -> tryUseParent (locLDTToLocDT loc) w
     COPIER _ -> copierItemUpdate itm cr w
     HELD FLATSHIELD -> rootNotrootEff createShieldWall removeShieldWall itm cr w
     HELD MINIGUNX{} -> coolMinigun itm w
@@ -223,9 +223,9 @@ doAnyEquipmentEffect :: LocationLDT ItemLink OItem -> Creature -> World -> World
 doAnyEquipmentEffect loc cr = maybe id (equipBackgroundEffect loc cr) 
     $ loc ^? locLDT . ldtValue . _1 . itLocation . ilEquipSite . _Just
 
-tryUseParent :: LocationLDT ItemLink OItem -> World -> World
+tryUseParent :: LocationDT OItem -> World -> World
 tryUseParent loc w = fromMaybe w $ do
-    t <- locUp loc
+    t <- locUp' loc
     cr <- w ^? cWorld . lWorld . creatures . ix 0
     return $ gadgetEffect InitialPress t cr w
 
diff --git a/src/Dodge/HeldUse.hs b/src/Dodge/HeldUse.hs
index 4c892ff4e..2af4ad956 100644
--- a/src/Dodge/HeldUse.hs
+++ b/src/Dodge/HeldUse.hs
@@ -8,7 +8,6 @@ module Dodge.HeldUse (
     heldEffectMuzzles,
 ) where
 
-import Dodge.DoubleTree
 import Color
 import Control.Applicative
 import Control.Monad
@@ -43,18 +42,18 @@ import RandomHelp
 import qualified SDL
 import Sound.Data
 
-gadgetEffect :: PressType -> LocationLDT ItemLink OItem -> Creature -> World -> World
+gadgetEffect :: PressType -> LocationDT OItem -> Creature -> World -> World
 gadgetEffect pt loc
-    | UseHeld{} <- loc ^. locLDT . ldtValue . _1 . itUse =
+    | UseHeld{} <- loc ^. locDT . dtValue . _1 . itUse =
         heldEffect
             pt
-            (locLDTToLocDT loc)
-    | DROPPER x <- loc ^. locLDT . ldtValue . _1 . itType
-      , Just i <- loc ^? locLDT . ldtValue . _1 . itUse . uInt
+            loc
+    | DROPPER x <- loc ^. locDT . dtValue . _1 . itType
+      , Just i <- loc ^? locDT . dtValue . _1 . itUse . uInt
       , pt == InitialPress =
         dropInventoryPath i x loc
-    | CLICKER x <- loc ^. locLDT . ldtValue . _1 . itType
-      , Just i <- loc ^? locLDT . ldtValue . _1 . itUse . uInt =
+    | CLICKER x <- loc ^. locDT . dtValue . _1 . itType
+      , Just i <- loc ^? locDT . dtValue . _1 . itUse . uInt =
         useInventoryPath pt i x loc
     | otherwise = const id
 
@@ -1412,12 +1411,12 @@ useRewindGun i =
 dropInventoryPath ::
     Int ->
     InventoryPathing ->
-    LocationLDT ItemLink OItem ->
+    LocationDT OItem ->
     Creature ->
     World ->
     World
 dropInventoryPath i ip loc cr = fromMaybe id $ do
-    invid <- loc ^? locLDT . ldtValue . _1 . itLocation . ilInvID
+    invid <- loc ^? locDT . dtValue . _1 . itLocation . ilInvID
     j <- getInventoryPath i ip invid cr
     return $ dropItem cr j
 
@@ -1444,7 +1443,7 @@ useInventoryPath ::
     PressType ->
     Int ->
     InventoryPathing ->
-    LocationLDT ItemLink OItem ->
+    LocationDT OItem ->
     Creature ->
     World ->
     World
@@ -1459,7 +1458,7 @@ useInventoryPath pt i ip loc cr w = case ip of
             w
                 & cWorld . lWorld . delayedEvents .:~ (1, UseInvItem (i + j) pt)
     RELITEM -> fromMaybe w $ do
-        j <- loc ^? locLDT . ldtValue . _1 . itLocation . ilInvID
+        j <- loc ^? locDT . dtValue . _1 . itLocation . ilInvID
         guard $ (i + j) `IM.member` (cr ^. crInv)
         return $
             w