Glad you found a solution that works for you, Zetell. And yeah... you should be able to route the same signal from the D8B to multiple destinations such as the Buss that can be set up to go out the Alt I/O card, so that should work just fine.
Somehow I thought you would ideally want the full track count from the D8B or tape machine to be duplicated to your computer, and since you used analog I/O cards in the Tape slots, a few patchbays with a half-normalled setup would do the trick. But I guess I went a little overboard and off on a tangent as so often, haha
Bruce, that setup at the TV station sounds absolutely crazy! I only got to visit the audio department at a TV station once (regional TV called "Bayerischer Rundfunk" in the South of Germany/Munich). I remember starring at a large square Matrix-Patchbay that was in one of their walls of racks, not being able to wrap my head around how it works at the time.
I really liked the vibe in that place though - and they were running live-broadcasts while I was visiting. Seemed really stressful, but exiting.
I can only imagine how crazy it must have been to do the Y2K event live... I was just waiting for planes to drop out of the sky on that date, but luckily, none of that happened