That's SPIF ("single-point incremental forming"), which is mentioned in passing in my note: > These can presumably be removed, permitting traditional SPIF proc

That's SPIF ("single-point incremental forming"), which is mentioned in passing in my note: > These can presumably be removed, permitting traditional SPIF processing of raw foil by sliding the point over the foil; a better alternative might be... I don't think it's closely related to 0-_-0's "folding" idea.