Well my C-Hubs are GPM - although I dont really like GPM much, there are better products on market that are better and just as cheap, but mine are a year and a half old; and they have neither broken nor bent so far. But then again, I dont go bashing as such, trying to jump with my MT2 that, which I should only attempt with a savage or something with as much travel and beefed up suspension.

With the flywheels, yeah I agree...I have lightened flywheels on nearly all my RC and some are the fanned race versions to bring in cool air and work VERY well. But in terms of saving money, there are so MANY mods that you can do that are better than or just as good as the purchased versions...if you think laterally.

But I have to say that Billet is worth it in the long run. Not to say dont buy GPM or other cast parts, but the long term performance and cost outweighs the price of the parts.