I installed a 'throne' riser for a friend of the family (who has bad knees) in their coach.
They bought the unit at Camping World and I installed it in the park in Florida they were at. Very simple & straightforward job, I doubt took 30 min. to do it.
Ted 'n' Laurie, plus Jackson (aka Deputy Dog, the Parson Russell Terrier 'fur kid') and, Rylie (who crossed the Rainbow Bridge June 14, 2012).