I spent 1 and 1/2 years deconstructing and then rebuilding my camper. Really the only thing original is the snap n nap, bathroom, Windows, siding and roof. I even replaced almost all of the framing including the main support beams. There is not one seam that doesn't have new butyl tape and thousand upon thousands of new screws. I am more than happy to try and share the info I learned throughout the process. I have a blog that might help... And hundred of photos, but trying to explain the snap n nap is hard. But let me know if I can be any help.