THIS MOD PREVENTS THE TRUCK DOORS FROM OPENING!!!!! Now that that's out of the way: I wanted his arms to be cleaner. I removed the doors, removed the black runners along the arm sides, glued the runners to the doors, and then glued the doors to the back wall of the truck cab. The result is that the doors are on Prime's back like a backpack. As a bonus, this allows the shoulder kibble to rotate backwards (after loosening the screw). After doing this, I discovered that the old door hinges did a great smokestack on the arm impression. The fender kibble also looked primed to hold some missiles. Voila: Note the leg mod (performed earlier) is not the extension, but rather the shin cut-away.