@foone He also had problems with drilling the holes in the board, so he was building an X-Y rig for a drill.
We spent a long night with an Acorn A440, me on the front end with the keyboard, him on the back end with the printer port and an oscilloscope, working out how to write a driver for this thing that ran off the !Draw files he'd use for the board designs, and would put the holes in the right place.