I have a Sony C7 Betamax tucked away in the attic. Superb piece of kit in its day. I used to repair vcr tape machines and colour tvs back in the day, and can assure you that the c7 technology was years ahead of its time, although the azimuth tape spinning head system was already dead before it even came to market. Laser video discs were already being developed and trialled. What a sight that was 12inch video discs, never tookoff because of fast developing 6 inch dvd format. You have made me want to dig it out and give it a whirl.