Michael, thanks for such a comprehensive and detailed answer, I'm touched!
Of course I don'T "do chains all day" :))
And, nevertheless, I do not think that you here present, script writers, all the day engaged in" gears or thread or the creation of nuts or extruded tubes.

Of course all that I described above, you can do once and forget about it.
Also, as the gear, nut, bolt, spring, hose or something else.

Then why there are scripts? ;))
Or actions in Photoshop? Or macros in other programs? Why all this?
All, all you can do without them, right? ))

PS. This is just my private opinion is not claiming anything more))))