Corbin seat and backrest? Worked for me on my America.

As for the knee, my right one's mashed.I just use an elastic pull on knee support and carry a folding walking stick.


Dinosaur.

"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland

"Don't let the bastards get you down". Kris Kristofferson

"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville