Ok, one more question on the Holley jetting.

DrCharles said

very carefully :p
I drilled and tapped a piece of 1" aluminum bar stock for 6-, 8- and 10-32.
Setscrew threaded into the bar, bar located on tabletop drill press, then drill very gently (fingertip pressure).
I'd like to have a mini lathe but I don't.

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Nothing wrong with that. Same way I do it except I have a lathe here. When I help someone else I use a drill press or a hand drill to hold the fixture and drill it.

I assume you have a pin vise? If so, I usually start .004-.006 smaller drill than I want and and then finish with the drill I want. It’s easier to keep the hole sizes where you want them. I always pin drill everything when I’m done to make sure it’s where it should be.