I have a two year old Phantom II that I shoot a lot. The cable guard has started vibrating loose and I cannot get it to remain in the same place for very many shots now. This bow shoots fantastic until this happens and then it will no longer group anymore and if I dont catch it soon I will get severe fletching contact. I have tried loktiting the set screw but the cable guard still moved and dont want to strip the screw out. Does anyone have any suggestions?