I used to ride years ago, and this Diamondback and Hoffman have been parked since I stopped. I want to get back into riding, and clean these bikes up, maybe upgrade them. Are these bikes worth messing with? If so, what should I do as far as upgrades? Do people still use front brakes and gyros? I've heard of people not using any brakes at all. Both bikes have front and rear brakes. The Hoffman has a gyro setup. Any opinions welcome, thanks.