Before receiving the adaptor, I'd been flushing about six seconds past the flash, then waiting 15 or 20 seconds and pulling my shot. With the adaptor, I can see that the group temperature is about 198 degrees when I stop the flush, and goes up to about 200 degrees by the time I pull my shot. So far so good. But then the temperature drops steadily during the shot, sometimes all the way down to 191 or so. What gives? I thought the temperature on an E-61 machine stays pretty stable throughout the shot. By the way, the boiler is set to 1 bar and I allow at least half an hour for the machine to warm up.
I also tried flushing all the way down to 185 degrees then waiting for the HX to rebound up to 198, but this seems to take a long time and I'm not sure the results are any better. Now I'm not sure what I'm doing wrong. Maybe I'm a victim of too much information. Sometimes life is easier when you live in ignorance.

Anyone have any suggestions for getting the most out of the thermometer?