strange problem, i used the full cab back on the mojave2 cab (grey plastic) with no bed planned. however since then i bought the marlin bed (red plastic) to go with it. seems the bed is about 8mm narrower than the cab is (4mm per side). so is there a difference and marlin is actually a few mm smaller? the half cab back looks to be the same width as the full cab back. the cab can not pinch any narrower. idk, i would have thought it would all be closer to the same size/width.