Hi Fred
I too had to replace the bathroom floor and entire rear area of my 94 T-2670.
As for the toilet flange after you remove the screws it is threaded into the top of the holding tank.
Here is link to my post on floor repair.
http://www.sunlineclub.com/forums/ph...215&highlight=
As you can see I had to remove the bathroom vanity and the rear lower bunk.
The damage in my TT extended down the center all the way to the couch.
I removed all the damaged wood and wet insulation and ran a fan to get good and dry, treat any mold areas with a solution of bleach and water to kill the mold.
I used a Marine grade plywood and installed a laminate floor over that.
Hope this helps and good luck.
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