diego - Magnetic tape (video or audio) should be rewound periodically. Exposure to magnets can mess up magnetic tape. The tape itself is magnetic. Therefore, if you just leave your tapes un-spun for a while, you're essentially leaving them next to magnetic field (albeit a very low level magnetic field). Magnetic tape is impressionable which is why you can record over it so easily, so even this low level exposure will have degrading effects over time. This is why you run them, just so the tape doesn't wind up sitting to the exact same magnetic field for too long.
Sal- Do you have the new teaching versions with the application breakdowns or the original footage of from the survey?
RD-
We couldn't sell them because we don't have the rights. If Sal sells them, it will be copyright infringement. He might be able to argue that he's only duping them and the money he takes is just duplicating fees, but if called to task, he'd be arguing that against Hagood's lawyers. Beware.
Through this thread, I just discovered I have access to the entire series within a friend's personal library (not Sal, another friend).