Mike AE4ML,
I have both the IC-7300 (Winlink Hybrid HF Station) and the FT-991A 'shack in a box' in my go kit.? If you are considering only HF operations the ICom option is my personal recommendation.? Some ops have commented that they find the 'clicking relay' objectionable but I'm old school.? I've the audio level set just high enough that with the relay and the audio I subliminally know the station is functioning normally.? As others have commented, Yaesu dedicated the "normal" 9k6 pin in the accessory dataport to RTTY and the work around has been described earlier.? Note too that a couple of the menu items speak to a "DAKY" option.? It's not described specifically in the manual but it controls but you need it selected so that the radio switches between SSB voice and SSB Data properly (e.g front panel or ACC port).? used to carry a short adapter cable that did the conversion from a "standard" mini-Din-6 cable to the Yaesu config.
Ian VA3QT