Step 9: Modify your comb
Use diagonal cutters to remove two inches worth of teeth from one side of your comb. However, I found it is beneficial to leave a few teeth on right at the edge. Later on, these few extra teeth will help act as a safe guard to keep the comb on track.
When you are done removing teeth, sand that section of the comb smooth.
Lastly, drill an 1/8" hole on the opposite edge.