After fiddling with this thing for the last two hours...I'm giving up until some advice. I got this kit from SOR to rebuild the caliper piston gasket and dust boot and everything went swimmingly until the dust boot. I can't tell if this design is just bs....I'm doing something wrong.... or the aftermarket boot is just a crock of crap. Basically the ring that is supposed to hold the boot to the caliper flange just will not hold it....the boot slips off on first brake activation. By my instinct there should be a groove in the caliper flange (not the piston) and the ring should set the boot within a groove. The boot design though also has a rubber bit on the rim that also impedes it from getting a deep attach. I've attached it now three different times and reactivating with the brake pads just pulls it off. Here are a couple of pics... Advice appreciated.