Well shoot me in the foot....... I never thought it may have a left hand thread. I hope that isn't the case here cause I will feel like an idiot for not twisting the other way. I did call a pro shop though and he did tell me it was in there with JB weld. Hopefully, it doesn't discolor but, if it does I have a polishing kit at work for carbide, sure it will work for carbon as well.