That's cool stuff, Looks like your son builds some nice fixtures that it's obviously necessary to be quite Heavy Duty. Lotta man hours in those fixtures.
Only asked as I've done Tool and Die, Prototype, Rubber and Plastic Moldmaking, lots of CNC programming and operation and currently repairing Plastic Injection Molds.
Other than making my own stuff about the only segment of the industry I haven't been in is the Automotive motor side though I did machine lots of axles, spools, gear drives, main caps, rotors etc when I worked for the long defunct Summers Brothers many years ago.
Betcha a 5-Axis machine would come in handy for some of that work.
Thanks for providing all the images, I enjoyed looking them over.