Hi Spec = NO SERVICE.
They did some recon calipers for my sierra years ago, a excellent job, even left the BLASTING GRIT inside the things when they rebuilt them with SS pistons, then fitted the brakes, on seperate bells, but did not grind the inner edge of the outside pad down enough so when they were worn after 100 miles they were wearing the bell away around the bolts when the pad metal touched the bell as brakes were operated.
Hi Spec did ALL the work, all I did was take my car to him.
I still have the discs, if anyone wants a looksey.
tabetha