I had EE.E showing on my display. You showed me the diagnostic page that pointed to the temp sensor unit, or one of two ICs. I replaced IC48, then saw flickering 88.8. At that point, I was getting heat from the coil. That symptom pointed to IC47. But shortly thereafter the displays went dark and I lost heat.
If you bring your piles of boards to Chicago, there is a chance I could find one or a pair that work. Maybe I could help you unpack.

I'm buying an ATL2+ just as soon as I have all the cash assembled so this really isn't all that critical as you're not shipping your new E6 kit yet either.

I would like to get it going though...