I have problems with the front right hand caliper leaking on my 1996 FLTHC I have replacved the piston, seals& boot, the bore looks ok but it does have a slight mark about 3mm wide and 15mm long in the centre of the piston travel ( not deep). The mark is around the diameter not length ways as the piston travels. The caliper flexs / moves when the pressure is applied but the left hand one does not flex. Is it a problem with wear in the caliper slides and if so can they be sleeved or is it better to buy aftermarket calipers.Thanks Pat