Hey luthiers, I am hot rodding my jazz bass by replacing the current pickups with some different ones. After removing the existing pickups, I found out that the new pickups were about 1/8 inch too fat. Because I do not have any industrial tools, I thought I'd use a box knife to shave the pickup hole bigger. The wood is extremely hard. Box cutter isn't doing the job. Any ideas to enlarge the pickup hole?