Just a heads-up that I have learned where people are using FST4 on 160m out here. I tuned to 1839, which is the default FST4 frequency in WSJT-X version 2.3.0. and called CQ and to my amazement got a reply. Most of the amazement is due to actually making contacts on my very substandard 160m antenna... Have worked a few countries across the English Channel or North Sea this way. People use the 60 second cycle it seems. I like FST4 with the 120 second cycle- very sensitive. A friend in 9-land USA and I managed QSOs on 20m and 30m when it would have been impossible on FT8. I think it’s slightly more sensitive than JT9. Might be good for 160m DX? Where is the US FST4 freq on 160? Maybe 1839?