I have worked a deal to trade my stock Hebo bars for a "custom" made Shark fin for the rear rotor. The guy will fabricate one for me out of aluminum. My question is this. There are two holes on the bottom side of the brake caliper?, I am afraid that mounting the fin here will transfer all of the shock of a hit to the brake casting. The holes are threaded and are obviously made for something to be mounted here. Any ideas or suggestions would be appreciated.