nice write-up FW
I have one thing to add to your overanalysis....
take a look at the video on the following page.
The fridge is supposedly tipped 3 degrees
RV Fridge Off Level | Dometic Overheat | Norcold Overheat | RV Fridge Failure
this one is very cheesy, but it shows that the 3degree spec isn't a good one.
This guy has lots of other info on his site too, if you dig around a bit.
For what it's worth, I'm not in any way attached to this company. Just read a lot about the device on another forum and so I bought and installed on on my fridge. I can't say first hand that it's helping, but I do sleep a little easier knowing it's there...