New to Fifth Wheels, Couple Questions

I have a tonno pro tri-fold made with vinyl over alum. Great cover but when folded up it sets a little more 3 inches higher than by rails. Due to my fords bed length the tri-fold sections are fairly long and by adding a fuel tank in the bed the filler neck was under the torno cover so no good. I just replaced with a Tuxedo roll up which is so much easier to open and a lot more practical for my application. I will sell my tri-fold cheap. F250. Rusty