On this picture You see some professionel tools together with an unperfect recorder.

a hand hewed rasp 2 Japanese stinging iron a knife with a broad blade a scraper for refinishing the wind-channel an abrasive paper holder for smoothing the wind tunnel ceiling a knife with a middle blade for working on the labium a fine, conical rubbing awl to enlarge the holes a narrow blade knife to undercut the holes a small plane for block-making