The pots supplied in the blackouts set are slightly bigger on the tread than my old ones. Which means making the holes in the body of the guitar bigger, which i really don't want to do since it has just been painted. Is it possible to drill the hole out without chipping the edges? The cavity is really small so i need pots the same size as the ones supplied (mini pots??) the Stew Mac 25k pots are too big in overall size but the thread size is correct.. any suggestions?