For someone who has already installed the Van's ELT/Strobe Mount in a 7 or 7A, when installing per the plans & instructions, how much clearance in offered for rudder cable clearance? I plan on installing the bracket to the J-stringers before installing my skins to avoid difficulty with rivet installation. Can you push the bracket right up against the lower J-stringer? Would it be necessary to dremel out the fore and aft, skin-side edge of the mount a bit to allow for more clearance to avoid cable chaffing?