My rear brake caliper is a one piece design that fits in a sliding groove in the rear swingarm and is held in place with the use of the rear axle through bolt. It has quick change brake pad pins that are held in place with cotter pins. The front are also held in with the same quick change pins. Are the pins required to be safety wired for tech? Also the rear axle nut is the self locking type but the through bolt is solid. So is drilling the nut on the edge and securing it to a solid attachment point ok?