I changed out my rear caliper on my 04XB12R due to some striped threads, and put new Ferodo pads in. I have noticed that the pads are wearing uneven. The pads against the piston seems to be thinner in running them for the last few weeks. I replaced my rotor also and have noticed that the same pad is not wearing the rotor near as smooth as the other side. I checked again to confirm the pads are seated correct and the brakes have been bleed very well with the MityVac. Should I be very concerned. I do have some new OEM pads I could put in place of them. What do you guys think?