Auntielo1...since I've been through this...I suggest you keep all communication through e-mail / texting / snail mail. Everything needs to be documented and not he said / she said. I would give a quality repair shop / body shop recommended by FR a chance to pull off cap (or whatever) repair that is justified to try and fix the issue. Legal action is the last thing you want to do. Give Josh and FR a chance to fix unit. I would also inspect the coach while being repaired to give you piece of mind that the repairs are done to fix the leak problem and make sure (guarantee) there will be no mold issues in the future.
Just my 3 cents
1971 20ft fireball (too small)
1987 27ft Tioga (bad brakes / tires)
1998 36ft Discovery (rattles / air leaks)
2005 37ft Monaco Knight (lemon Lawed)
2008 40ft Monaco Diplomat (too big)
2016 Forester 3011 (ordered June 8th - Born Aug 6) IT'S HERE