I had to rebuild the front brake. I rebuilt the master cylinder which was successful, no leaks and works as it should. Tore down the caliper, stripped the paint and sent it off to a powdercoater. Replaced the caliper seal, new lower pipe and added a speed bleeder (had it lying around from Shaun at Slingshot - RIP), put everything back together and lo and behold it's leaking where the pipe goes into the caliper body. It's as tight as it could be and it leaks. Didn't do this prior to the tear-down. I did all this because the piston was frozen. Why would this leak when I've used all OEM parts?? Only aftermarket on this set-up is the speed bleeder and replacement stainless lines (once again thanks to Slingshot). Anyone have an idea why it would be leaking brake fluid?