yes… well because the box and cab are about 50mm apart at there widest. I intend to fix wood to the inside wall of the cab & the outside wall of the box. The cab & box won’t actually touch but the neoprene will bridge the gap, being fixed to the inside of the cab and the box, this should be able to take up the difference in the movement.This looks really good, great work so far. Just to clarify, are you referring to attaching the neoprene (wetsuit material) to the wood lining in the walkthrough area? And is this intended to reduce movement between the cab and box of a vehicle?