Arrrg, brakes!, I hate em! Options

[mike_the_man]

Ok guys, I need your help. I'm having some problems with my brakes. I have adjusted the rear venting clearence, rebuilt the master cylinder, installed a T in place of the proportioning valve and replaced all the fluid with new DOT 4. I have also checked all the hoses, and the look good, no cracks or anything, and there are no visible leaks anywhere in the system.

The problem is, I can't get a solid pedal. I have bled 3 times since rebuilding the master cylinder and installing the T. I bled once using a vacuum pump, once with a friend stomping on the pedal, and once with a pressure bleeder. I can't see any air coming out, so I'm assuming thats not the problem.

I'm stumped, and very frustrated. The only other thing I can think of is that the calipers need to be rebuilt. They don't look like they're leaking, but one could be stuck. Could a stuck caliper cause a soft pedal? And it's very soft, I can get almost all the way to the floor if I really stomp on it.

Any ideas? I'm getting really close to taking it to a mechanic, but I'm to cheap and to proud to do that. I'd much rather fix it myself.

Any and all ideas greatly appreciated.