So I am customizing a guitar by putting an old 60's Tele neck on a Strat body and I put it together and put the first string on. Then, I realized that it made a bad buzzing sound and I put a shim behind the neck to see if that would help. I think the problem is that the frets are really old but im not sure. How do I put frets on? Or do I have to have someone do it for me? Any help is accepted.