Hi all.  I purchased a PJ set of EMG GZR passive pickups to replace the stock Jackson units in my Charvel. They came with the idiot-proof pushfit wires and pots. Having undertaken wiring stuff before I felt pretty confident.  The unforseen problem is that the new pups don’t quite fit the slots where the old ones came out. It feels like a very small amount of sanding or somesuch is required.  Please advise on the best way to widen the holes without ruining the paintwork! cheer