Jon Anderson wrote:

Timing, I'd just have to wing it I think. I've got good reflexes still,
I think I could do it. And, it would be easy to anneal, just as with a
purpose made welder, bump the weld button until the blade is the right
color.

The welders I've used have a kind of "latch" mechanism that applies
upset pressure and turns on the weld current, and when the clamps move
together a certain amount a catch trips and the current is shut off.

Jon