I had the one from my last trike that required the black mounting system and the rest with the solid support bracket not the one you have to squeeze together to mount. Smooth Style Adjustable Rider Backrest
$124.95 I felt that it was more adjustable than the other The hardware cost like 230. I did not hitch up the button, because I'm the only one that rides my trike, and only used the button once to get it where I wanted it. just hopping for early spring, my bike was delivered 12 /17 I only put two miles on it