I have a 92 Dolphin and the flooring in th batheroom is rotted. I know I will need to take the toilet out. I guess I need to support the holding tank underneath when I do that? Will I have floor joists going across the body to attach new flooring to? Anyone have any idea how far apart the floor joists are?...and..Any idea of what metrial the floor is made of and how thick? I only want to replace the flooring in the bathroom as the rest of teh coach is solid so I want to try and stay with the same thickness of flooring. Also is the wax ring on the toilet smaller than a standard size? Can I go to the big orange store for a repalcement ring instead of an RV store? Any suggestions for replacing wax ring? Thank you in advance for your help. Appreciate it!