I've had the same problem making dubs of finished masters. I no longer TBC
them.
Seems these desktop TBC's (the full-field ones) all have a certain amount of
delay (300ns or so?). Add a couple of pass-throughs on top of the Toaster, and
you've got a few ms's. It's about 3 video frames. Goos luck.
PMFJI, but the delay is not measured in nanoseconds but in milliseconds. A
full-frame TBC can easily add 33 milliseconds to your video signal. Then,
should you use a Toaster digital effect that re-maps your video, another 2
frames (67 msec) are added. (Look for DV1, DV2, and your input buttons shown
depressed at the same time.)
If you need the very best dub done (and have the money), use an audio delay the
compensate for the TBC delay. Or, as you found out, just run directly from
machine to machine.
Bruce PreVue Technologies Amiga Vendor section 5