On Nov 13, 10:43*pm, "Upscale" wrote:
"Larry W" wrote in message
hand-held drill on the workbench. It's not perfect because repeated
use will enlarge the guide block hole and allow some play, potentially
making the target hole somewhat off-plumb, but it works pretty darn
good if reasonable care is used.

Thanks, I'll keep that idea in mind. I may even have a source for a metal
guide block with 3/4" hole in it.

If it's already got the hole, go for it, but no real need for metal
unless you're making benches on a production line.