Jack As to this problem being unique Dear wife and I owned an older
Bigfoot 17 which had a sagging roof ( rather than being unique the sagging roof thing seems to be standard equipment for older
Bigfoot 17s ) . When we had the Bigfoot we would visit with other Bigfoot17 owners at gatherings and found many with the sagging roof issue so should be lots of advice here on solutions . The best solution I saw was the installation of a matrix of interlocking wood strips but the probability of my workmanship coming out as good as that persons was slim and none so I decided to go with the Antique Roadshow attitude call it "patina" and move on. Lee and Norma