This evening an old work friend called around for his regular fortnightly visit.
"Got a little something for you", he said, "it must have been in my garage for about twenty odd years, and I found it the other day, as I was having a clearout".
I opened the box, and to my surprise, I found this,

An absolutely tiny auto tapping head, with an easily replaced 1MT arbor, and by the looks of the chuck, will accommodate taps of about 4mm and below.
I was only discussing this sort of thing on here a week or so ago, where I usually only do small tapping by hand.
Maybe I should have a rethink.
Bogs