@dc42 Thanks! Was just reading this as you replied:
Z probe trigger height second order temperature compensation is now supported. To use it, specify a 2-element array as the temperature coefficient, e.g. "M558 ... C0.01:0.0005"
Just tried the firmware from dropbox, and it works like a charm. Thanks for taking the time to put this out on a weekend! 👍
Also -- and I'm sure you get this a lot -- but I can't get over how easy the firmware update was. Kudos.
Ahh, that's what I was missing. Thank you!