Update:
my unit, that had experienced one thermal shutdown, and several other non-heat related shutdowns, will be on it's way back Monday ( mesa's closed tomrrow).
The transformer worked it's way loose in transit back to Mesa (wasn't loose here) and damaged one resistor and one mosfet on the boards next to it. One relay was replaced; some other components were updated.
Apparently, the top cover and transformer retaining bolt have been tweaked to help keep it from shifting during shipping as a result of some of our TalkBass user notes I included in my return "cover letter" decribing my problems, and some of the common issues several of us have had. Mesa say they've had *NO* transformer coming loose in the field issues, only during shipping. Worth addressing anyway! They told me they added more vent holes to the top cover...
Gotta love a company that not only listens, but responds with design changes.
I'm glad to hear it's on it's way back soon. I miss it. Great tool.