If your not at least 75% confident, then I wouldnt try it. Its very easy to ruin resin. But then again, youll never know unless you try. I didnt attempt anything like this until I had built a fair amount of resin trucks, and back then the resin was much thicker. You might be able to get away with using the hood and grill from a DM 800(which already opens), and the resin fenders. The hood should be pretty similar in shape to the RM, and if not should be easy to fix. Im sure I have an extra hood.