I'm in the process of getting a flagstaff 2014 hw27sc. It would have been mine if not for a hiccup on the part of the bank/lien/out of state seller so I offered to hold it for seller until u could finalize at bank... that's when the fun began. Initially saw popup already setup. It has sat uncovered dormant for 1 yr in az. The current original owner had left light on and closed camper allowing the light to melt through the back and side paneling which were replaced by dealer last year. He is selling now since he is out of state. He admitted that the caretaker of this god last year noted that it leaked around the ac but after caulking externally that resolved the issue. Once I got it home (still haven't paid until bank can get papers) tried to do a setup and the power lift fails... call owner and he agrees to get it checked out. Met a nice retired guy that was referred by shop to look at lift... says easy fix but oh by the way the roof looks odd and you might want me to look at it because it may need a brace to support the ac... ok. My question is should the roof sag a little over time? Is that normal? I'm worried it has more to do with the heat damage from the melting light and if so what else will happen over time. That and the sealing of the ac is that normal in heat yearly? I'm fine getting used.. just don't know what I'm really getting. If the slight sag in roof is ok I'll just resign myself to sealing ac unit regularly. Any help welcome.