- He uses a transparency type material for his F-hole pattern
- He uses an adjustable width hand drill to cut the ends of the F holes
- The F holes are 30mm below the “sound center” of the instrument
If you don’t fall asleep during the presentation, there’s a lot to be learned here. He uses an exacto knife to cut out the rest of the F-hole for a very precise cut; I don’t think this method will work particularly well for someone on a cigar box guitar however; the plywood nature of the box lid causes the inner grain to be set 90 degrees from the top/bottom grain, so carving a CBG lid is going to be frustrating at best.