Basically my sump plug threads are almost gone on my multi 1200s 2010. I don't wanna drill or tap into the sump. So I'm thinking to use a timesert to reduce the hole from M12 (correct me if I'm wrong) to an M10 and use JB weld marine strength to lock it in place into the original hole of the sump. So if my original plug is an M12 1.5 (from what I've found online) what timesert size shall I choose so it can bond into the original hole. And what will be the inside measure so I can choose the correct new sump plug? Thanks in advance.