Can I swap hayes calipers with other hayes levers? I have 22mm post mounts on my homegrown frame. I don't want to run 7" rotors so I can't really use the adapter (22mm to IS), which means I need to run old school 22mm hayes calipers. Can I buy a newer set of brakes, or even just levers, and run them with the older calipers? I wouldn't mind a nicer, newer setup, then just throwing the old caliper on back.