OK, so the Thetford 31661 toilet in our 31' Minnie got stuck, and threatened to overflow. I went online and found that this problem is usually due to a broken or stuck water valve. So I purchased a new valve and installed it, but couldn't remove the toilet because I couldn't remove the the nuts from the bolts that hold it to the bathroom floor -- they seemed to be fastened together somehow, and I could only move each one about a 1/4 turn, the nut and bolt moving together. Not wanting to strip or break anything, I found I could replace the valve with the toilet in place. But the new water valve didn't change the toilet from doing what it did before. And now the water line feeding the toilet is leaking where I used the old connector. A separate issue. But back to the toilet: it appears that the spring-loaded lever that opens and closes the water valve is somehow binding and won't return completely to its "closed" position, which would also close the water valve. Now, it seems like a completely new toilet, with a new water line connection, is needed. But I don't know how to remove the toilet without removing the two oddly stubborn nuts and bolts. Can anyone tell me how to do this without breaking something I'm going to need? TIA.