In article . li,
says...
Or this bloke, who makes his own vacuum tubes...
http://highfields-arc.6te.net/constr.../info/f2fo.htm

Genuinely impressive. The soundtrack is suitably Gallic!

What's that electric welding sewing machine / punch and die hybrid thing
he's got?

I think you got it in one - a hybrid. The bloke's clearly very fond of
making special tools.

--
Skipweasel - never knowingly understood.