Just bought a 1985 19 foot Citation Supreme. The guy fibbed when he said no leaks. One at right front corner —-shows.Up under the mattress. Has been there awhile as rotting . The other one shows up as blackish water leaking out from under the corner of the cupboard under the stove on the drivers side.., It looks like the roof has been redone with tin. Any suggestions>??? I am also trying to find an owners manual on line.