Originally Posted by wagdog I have, in the past, shimmed one side of a nut to raise it slightly. I've also heard of people using a mix of baking soda and super glue to build up a nut slot - but never actually done that myself so I can't comment on the effectiveness. Pre-cut nuts, imo, are the way to go.
A guitar tech built up a slot for one of my guitars with a mixture of super glue and nut filings(the dust from filing down another nut). Worked great now for several years so I can testify to it's effectiveness.