[dr carver]

I have heard of one service center finding leaks by pressuring he camper via a vent and using soapy water to detect leaks. You may be able to adapt something like that to our TMs.

Maybe a shop vac with the exhaust duct taped to a piece of plywood duct taped to one of the roof vents (open of course). Some tape to seal some of the gaps between the upper and lower shells. Fire up the shop vac, douse suspect areas with soapy water, and watch for bubbles.

I've never tried this on a camper, but it is the same basic operation as gas line leak checks, air line leak checks, reactor leak checks, distilling leak checks, and so forth. It should work well. It may be a lot of trouble to seal the camper, but not as much as blindly taking stuff apart and putting it back together!