I modded my YYJ Classic. It started as me wanting to take the logo off so I could fingerspin, which I can now, and I decided to reshape it. It has more rounded edges now. It also grinds and fingerspins pretty well for a plastic. Vibes a little, but no more than a stock Classic would. Also, not really a mod, but I replaced the bearing with a One Drop 10-Ball, and the response is YYF white pads. I love it.