The RMS stations are a lot further away, and would require twice as many transmissions and reliance on infrastructure. I agree with the observation about the sound card on the FT991 which is why I mentioned it as a problem. It's the same on my IC-7100, the data port is required for wide mode operation. I'm surprised that calibration doesn't report the lack of bandwidth- it must catch a lot a people.
We're going to test again tomorrow between north and south. The weather is supposed to be fine. We'll be testing again on Friday. We're also going to try VarAC to go past the file size limit.
This is north to south from Google Earth. The hill looks formidable but as a single sharp peak we seem to be getting knife-edge diffraction.