Dear Ulysses,

I am going to let Dr. Guitar advise you regarding your nut problem. I am posting here because I have a question about the guitar you have. I find no "Martin DB7 GPZ750" in C.F. Martin's catalogue. I do find that Aston Martin does,or has in the past, produced a model DB7 automobile. I also find that Kawasaki has produced a model GPZ750 motorcycle. Perhaps your problem is not with the nut at all, but that you are attempting to play "Redhaired Boy" on either your car or your scoot.