It is quite a cool design, i'm having an issue with it though. Right now I can't get it to come appart. There's a failry large nut that has an extremely low profile height which makes it hard to turn it. If I could somehow find a tool that would work it would be great, but I haven't tried anything really yet because the nut and race look to be one piece and the last thing i want to do it scar the bearing race.