I finally got the Thetford toilet installed in my
Burro. I made a 1/2" plywood base to secure the toilet flat on the floor.
Burro floor was not perfectly flat. Got all the plumbing pipes etc. installed to and now I don't have to go to the restroom except to shower.
It fits nicely under the seat I made. Short Thetford toilet works perfectly and the seat cover is 1/2" above the toilet.