Re: toilet removal
I can't remember exactly, but I think, there has to be a specific max height between donut/seal and top of drain hole, so that it seats properly. No fudge factor like a hose toilet where you use the yellow stickum that you can add extra too. I don't think you can add an extra donut, but not sure. You might want to just passively ask at an RV service shop and see what they say. You sure don't want it loose that is for sure. POPPA is right with the long ratchet through the hole on the top but I did it the harder way and tried to put my fat little fingers in from the sides to wrench the nuts down snug......wasn't exactly the smartest thing I've ever done, but I got it done. BTW, while your working on new floor and after you have removed the old toilet, put a rag down the hole to keep stuff from coming back up, like smell, or things going down there that shouldn't etc. (even though your not using it at that time)