[DaveL]

I noticed a very complete list of things.
In addition, you might consider the use of hole saws, bending sheet metal and bending plastic.

We use hole saws (drill bit for cutting large round holes).
I would include finding the container.
Assembling the center bit with outer cutter.
Using proper form (square to the work, work piece clamped to a support board for sheet metal and use of safety glasses)
Removing cut part that may be stuck inside hole saw
Disassembling parts and returning tool to container and placing container back on the shelf.

Another skill is bending sheet metal (we are limited to manual techniques, but there is a world of skill needed to bend metal with a machine)

Along with bending metal is bending plastic. We do this with a hot air gun.
Avoiding over heating of the material, using protective equipment (gloves and safety glasses), use of forms to improve finish quality.

Other essential skills could include knowing when to use bolts or rivets as well as wiring electronic parts (being able to look up required wire guage and which wire goes where.

Dave