3D printed RC truck V3: Selectable Locking Center Diff Rear Engine

Basically the same locking center transfer case as my original design only it works with rear "engine" vehicles instead of front "engine" builds.

Uses the same bolts (but 4 more for the extra part) and bearings (2 more) as MrCrankyface's center differential.

All internals are the same as the front engine model