I understand ... thank you for a concise explanation. I've been thinking about going AFSK which, as you point out, would give me access to the other digital modes that I'm missing. Right now, I can't seem to key the radio in FSK mode (where AFSK would use VOX). So, I think that must be a setup issue somewhere.
In any case, it's going to be complicated either way as I have to rely on others to cable up the remotes correctly, one on the east coast and one out here in the west, especially if I go serial control.
Hopefully, we can talk soon and compare notes. 73, and thanks for all the assistance you've offered since I began the journey into remote radio control.

Dennis - WU6X