I operate WSJT-X (FT8) through a K3/0-Mini and RemoteRig RRC-1258MkIIs to stations on RemoteHamRadio.com Issues I have noted are that WSJT-X CAT control works poorly (or not at all) through the virtual serial ports created for the RRC. I use manually tuning outside of WSJT-X and set the WSJT-X band/freq pulldown to the proper band so logging is correct. Also, unless you have a PTT signal no MIC audio is passed through the RRC. You can configure a serial port to provide a PTT, or I use a SignaLink USB interface which has a VOX function which creates a PTT signal from the audio. I connect the SignaLink PTT output to the PTT input on the K3/0-Mini and it works fine to key the radio and let Mic audio through. Good luck, K6UFO Mark