Back in June last year (Here) after some discussion on the Guild forum about tapping guides I made one but since then I haven’t had a circumstance where I might actually use it.

Yesterday while doing a little job I needed to tap a 12ba thread in two sides of U shaped pieces. By gripping them (they are rather small and fiddly) in an engineers clamp I was able to rest the guide on the flat side of the clamp and use my shop made tap spinners to tap the holes. One tap spinner holds the taper tap, while the second has the bottom tap.