I've seen references to this but don't understand how it's done. Is this one of those "take it to a shop" deals or is there a method to do it at home? The reason I ask is that my new fork (misfit) seems to have the ISO mount a bit too far inboard so the edges of the caliper adapter, washers, caliper, and outter pad all rub the rotor. I need to face 1-1.5mm off the tab.