As I use a different antenna, rig, and the PC is not needed, I can use my 10m WSPR beacon (500mW, 100% TX, randomised frequencies) on 10m at the same time as looking on 6m MSK144 RX. As of about 10 minutes ago, I am also on 10m WSPR TX.
UPDATE 1828z: No spots all day of my 500mW WSPR beacon on 10m. I have a feeling this is as much to do with activity as conditions. With more stations active I am sure openings would be spotted. I shall leave the beacon running for a few more hours.