I have a Musicmaster and bought heavier strings for it on the advice of a TB-er. THey do sound better but the 'A' pops off the nut. Ive never tried to modify the nut, in fact most friend does just about everything for me on my guitars AND, i have to confess another forum advised me to not even think about doing this myself. But ... the tech is very expensive. I know he has to eat but this seems do-able to me. This is a 60s MM but it is no longer stock, new pot, new pickguard and now a new PUP (seymour duncan) so im not too concerned about the resale value in that regard. If i were to do this, how is it done? Thanks!