I've just checked and I haven't uploaded the latest rigcontrol docs. I'll do that when I? get home.? Basically the number after RADIO needs to match the INTERLOCK param in the port config. Yes, just use a different serial pair and hamlib port.
As always you are spot on, I worked this up into my config yesterday and works well.??
I am off to try to find more docs on the new "Radio" stuff.?? I want to add the other radio to the mix and set up similarly.? Is there anything special I need to do to do it with elecraft KX3 other than pick another hamlib server port and virual serial pair that you are aware of?