I just wanted to mention that my recent purchase of some hardware and one genuine antique from Jon went perfectly. The antique was a laserium digital cycloid generator board designed back in the late seventies - so, yes I'm a dinosaur. It’s been a trip looking over the schematic and realizing just how clever the guy who designed it was. I especially liked the technique he used to get analog modulation out of a Johnson Counter based d/a converter. (Hint the counter was implemented in CMOS)
brian