I just wondered if there's an answer to the question of getting
plug out of a fly cutter-- those hole saws used with a
drill press or power drill.
Only thing I thought of is boring nearly all the way through
then using the drill bit center as a guide on the reverse side,
finishing the cut so the plug doesn't get wedged in the
hole saw.
Coming up on a project for arrays, a hole saw makes the job
both easier and gives a smoother cutout.