Cool..... I grew up with scribe in hand. Dang sweet instruments.
Think sheet metal dust collection tubing..... we have to make a 8X8x6 wye. The 6 is coming into the 8 at a "calc'd" degree. Ain't always a 45*..... there are programs that will plot/print the template for the cut profile. The funny part is,a seasoned mechanic can have it laid out a cut/fitted before the programmer gets past the initial,what size tubing.
I'd done paid the dues on "fitting" in high end cabinet world for 30 sumthin years before branching(ha) into some pretty sophisticated DC ( dust collection) systems. I came up with a cpl very innovative solutions to nagging issues within that world,yada yada,whatever. But the basic mechanics of sheet metal layout really tested me. Got several,public domain books from the late 1800's,early 1900's and was positively SLACK JAW at what was "expected" from the apprentice back in the day....
Sheet,it was like somebody injected steroids right into the grey matter...... I was hooked,still am.