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Thanks .... I think you've covered it all, and, amazingly, it makes sense!
BTW, I qualify as one of those OG's re: BBN (BOLT BERANEK AND NEWMAN) but only in knowing the name and that they worked in acoustics (back in 1968), not in the establishment of ARPANet.
Enough of these tech details .... I'm going back to look for more movies to record now that I have a (more than) decent TV schedule on my DVR+ !!