Yep, typical problem on TT. When I had my Rockwood 2902SS I filed the tank and it fell out. I replaced the thin angle irons (the ones with the slots in it to make them bend easier) with steel angles.
2013 Prime Time 230 FBS
Days camped in 2013: April to November
Days camped in 2014...about 40
Days camped in 2015...more than 2014!!