FWIW, the baud detection in kenwood_live.py:get_id() indeed only tries the baud rate there in ascending order and stops at the first successful one, but even when I manually invert the list, 9600 is the only one detected:

Wow.

I took a look at this a while ago. From memory, even though it appears t loop through a list (in the wrong order) there's actually a hard coded value in there somewhere. That bit of code needs a re-write.

I got my th-d74 operating at much faster speeds after sorting that out. I will dig out the code if you want it.