Great job CS.
I've been pondering this design since you first happened on it with your compression fitting mishap in the Nazca thread.
Having a 1952 Delta Milwaukee drill press, rock solid at 130lbs, looks like I'll be attempting a few variations on your theme, in spite of your advice against it.
Would appreciate the depth measurements on the ID of both the 25/32 and 3/4 bores though.
Cudos on providing further stats/motivation, will post results and learning curve of my drill press adventures.