When the builder built my house the back of the toilet was right up against the wall. They replaced the back of the toilet with a skinny one and that solved the problem. It appears the rough in was off, I measured and its 11. Now I want to replace the old toilet with a chair height one. Should I buy a toilet for a ten inch rough in or is there a better way to solve my problem? Would this give me a little extra space on the back of toilet so it wont touch the wall?