My panel body is at a bodyman's shop. He has taken the doors of and on a number of times just to make sure that everything continues to fit. We have done the inner/outer panels and he is always measuring and pounding on stuff. He is also more concerned about the exterior fit, the stuff you see. He tells me that after my truck is done he won't be doing any more restorations. (maybe it's too frustrating) Sorry I don't have any more details on specifics, but he did most of the grunt work