I'm afraid to try this out again, I finally got a nice calibration with no weirdness on note B1 on certain patches (see Rock Organ F2 P105). I've been fighting with getting a good calibration until I did it with the unit switched off for a while and not letting it warm up first before the calibration. Just a tip if you're not happy with the results of a warm calibration. Oh, this is a full Clear Calibration and then a Calibration, from scratch. Note B0 is still weird for me with this patch, but that's very low bass and out of the way, really, I'm just glad to have this working a lot better.