Hello - I have a Warmoth pro strat neck with 6105 frets, maple/kingwood. There is one dead spot - the high e string at the 10th fret. That is the only dead spot - so I am assuming I need to file down the high e 11th fret a little. Any tips on how to do this myself? What grit sandpaper (150? 300? 80?). I am trying to do all repairs myself on this thing, and I would hate to take it in for one lousy fret. Thanks for any tips!