Thanks you for your comments. They are appreciated.
I believe I have a pretty good handle on the preflash and trigger pulse sequences, both TTL and manual. The remaining mystery is the detailed content of the pulses. We know that, at a minimum, they must contain channel, group, and power level data. Beyond that, it is still a question.
Why am I doing this? I really haven't a clue. Once the rest of my herd of PWs arrives, I will likely drop this for a while.
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