hi to all and merry christmas. i have been doing a brake up grade on my bird. i have a spare set of rear calipers. i am at an impass, i cant get the spring to compress so i can remove all the guts and seals so i can powder coat them. i have tried with a c-clamp on top a flat washer on top a socket. it won't compress so i can remove the snap ring. this all sets under the caliper piston and is part of the parking brake. has anybody had this problem? i have pushed hard enough to mash the hat a bit.