I've got the itch to customize my Van Gogh Shoes FP and bought an Onyx jewel. Logo MPS comes right off, no problem. New jewel goes right on ... wait .... problem. In the middle of the magnet is a raised polymer dot that seems to go through the magnet. Since the new onyx magnet is smooth / flat on the bottom (the logo medallion is convex) it will not rest flush with the cap inset and can easily fall off / be removed with my fingers without a magnet tool. Looking for assistance here. Should I drill a small recess to accommodate? Should I razor off the dot? Couldn't find anyone with the same problem. Thanks FPN!