I have a USX. I guess I bought mine from a good dealer. Mine came with nylon lock nuts (very good hardware). Sounds like a lot of dealers are keeping the good (expensive) hardware and putting the trikes together with cheap stuff. Nylon lock nuts don't vibrate loose. I love drifting through corners at speed, tires are predictable. I think it would only roll if I struck a curb. I LOVE IT! You could spend thousands more and still have all the same problems listed.