ok well looks like i need a new rear left caliper, not, i was wondering whats the deal with the Z brake converstion, i know Y2Kev has done it, but has anyone with a 4th Gen? Is this a good idea? costly? big improvment? i kinda just wanna talk to someone who has done this

 

http://www.seas.ucla.edu/~cheston/zbrakes.html

 

well looks like there is a lot more to this then i thought, i dont know now