OK, here are the three problems:<br/>1. The existing toilet (Seeland Traveller model 511) is 34 years old and no longer made.<br/>2. Base bolt pattern is four bolt. Almost all current RV toilets are 2 bolt.<br/>3. "Sit height" (floor to top of toilet seat) measures about 10-1/2" Entire unit sits on a riser of about 8" that cannot be removed or altered because the black water tank is...