Hayabusa Stick... uh... sticking? Catching?

I got a HRAP 4 recently and something feels off in the stick. You can sort of feel it... not so much grinding... but catching. It's extremely noticeable when riding the gate, and doesn't effect fighting game play... but. I can feel it, and it is really annoying. It also has a little bit of a squeak to it. It almost feels like it wants to hang up and just stay stuck at certain angles.

I've taken it apart totally and cleaned it and it really made no difference at all. Any advice on fixing the catching or squeaking?