Holy cow. I also worked at MDH Industries, for a few years starting in 1981 or so. That was also the first and only time I ever programming in Forth, doing embedded code for a new radiation calibration machine they were coming out with. Howard Marshall was the most brilliant analog circuit designer I have ever met; it was only decades later that I realized his connection with J. Howard Marshall the oil tycoon, Anna Nichole Smith, and all that.