Cool! I worked back in the mid 80s for a company supplying electroless nickel and cobalt finishing equipment to the disc operation, then a different company subcontracted control systems to me for similar equipment in the early 90’s, then a couple more machines, once again as an employee, in the late 90s just before they got out of discs.
Funny thing is to this day I am still designing software on a system i (AS400) LOL life long career.