I've got a set of Cadi calipers for my 14b disk conversion, they fit nicely without the pads in them but I can't get the caliper piston to return to 0 or flat with the caliper. With the pads I'm about 1/8" from them slipping on and the pison is about 1/2" extended from flat. Neither one moves back and I assume it has something to do with the E-Brake mechanism. Consequently, pulling on the ebrake manually moves the piston fine and then it returns to its original position when released. Can anyone throw me a clue?