[RKDinOKC]

Did electronics assembly as a part time job when very young. Did that kind of stuff manually with solder, soldering iron, heat shrink tubing and a heat gun. The tubing wasn't clear like the new stuff. Also the solder required more heat than the tubing. The heat required to shrink the tubing was a bit cooler so shrinking the tubing wouldn't melt the wire insulation.

Took Electronics in HS. Wrote a manual for TV repair. Both tube and integrated circuits, crt, and led. Teacher ended up using mine for his other classes.
My favorite part...Step 1.) Is it plugged in?

Bought a battery operated soldering iron/pen a few years ago that doesn't itself get hot at all. Just heats the wires and melts the solder.