Yeah, I was kind of thinking aloud that if the script could leave behind the circles (it already leaves the rail) then the problem of no history would be solved (right?). I think in this case the "the objects from its intermediate calculations" would make the tool/created objects more powerful. Or are the circles drawn in some random location?

I knew it was a script of steps to complete the object and I have actually been contemplating how to create an "Extrude Cut" script, unfortunately I am no good at coding. The best I have done is some basic LISP in AutoCAD.

Thanks for the reply.

Cheers,
Nick