Can't answer about the surface rider, but I'd think a large solar cover would weigh quite a bit when wet. I don't actually have to totally lift mine since I just pivot while holding one end.

I had concerns about mounting to my rails. Especially since I don't have flat rails. Mine rails kind of arch down. So I choose not to mount them to a rail. I sunk 3 4X6 pieces of wood for the rail. One on each side of the pool (right at the rail) and one for it to pivot off to while swimming. It has worked great for me.

David Slowik