That is a great idea I will do that with taps that have a round shaft. Thanks for the suggestion.
Ron High
I prefer a pin vise with a swivel head. Remember to oil the hole to keep the tap from jamming and/or breaking. Work slowly, turning the tap forward and backward. The backward motion pulls the cut material out of the hole.
https://www.micromark.com/Swivel-Hd-Pin-Vise-0-1-8
Marlon
See pictures of the Clinton-Golden Valley RR