Tom,
If it would be helpful I might be able to contribute to this effort. Back in June of 1967 I was recruited from Weldon Tech by Roy Alison to be an R&D Technician and member of the new electronics development team. Edgar made a deal to give us free rein for 5 years and we were disbanded in 1972. To say it was a magical time would be an understatement. I have endless information if you're interested. I've attached a picture of a younger me in the lab discussing a circuit design with my supervisor John S.
Best regards,
Mike M.