i need help with a front brake problem. checked pads, pistons and everything. all seems to be working fine but wont build any pressure. tried bleeding but still wont hold pressure. bought a rebuild kit for the master. pulled old plunger and seals out. the old one had o-rings on it, the new kit doesnt come with o-rings. called the place where i bought the kit and was told it must have been a redesign on the product. is this the case or is the lady at the dealer a crackhead? should i have the o-rings. either being the case, i installed the new kit and still get no pressure. any ideas?