Piper Aztec Pilot Air Vent Control Knob

This is the round knob that controls the overhead fresh air vent for the pilor and co-pilot in a Piper Aztec F. May be used on other Piper models too. This part is no longer available from Piper and is very hard to find elsewhere (and very expensive when you can find it.)

Openscad source provided for your enjoyment.