Shuttlecock feather inserting machine.
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Previously:
https://www.homemadetools.net/forum/...022#post153191
https://www.homemadetools.net/forum/...438#post107444
https://www.homemadetools.net/forum/...668#post111174
https://www.homemadetools.net/forum/...932#post124835
https://www.homemadetools.net/forum/...960#post168010