Hi all, this is my first time posting so please bear with me. I bought a used 14 Can Am Commander XT-P 1000 and decided to change the rear differential fluid. The Allen head of the drain plug was stripped when I first saw it, so after many tries, I used a screw extractor to pull it out. No problem there. The problem began once I tried to install the new OEM replacement. The new one is 10mm wide while the old is 9mm. I cannot find a replacement plug that will fit. Any help would be appreciated. I am thinking about using a die set to slim down the new one to fit. Or conversely, a tap to enlarge the current drain opening.