Rather was a very cool panel...
... It died as soon I powered it up, one of the capacitors in the power supply stage decided to blow up (yes, I fool you not).
It was from 2013... Pity.
But in the end I'm getting another panel that is, older and much simpler (and because I had a feeling this panel was a dud since the day I got it, even with the correct alarm/eol resistors it would only register an alarm condition half of the time and otherwise would shut down if I connected an NA.)
Clearly the fault lies in the motherboard and it's IMPOSSIBLE to find a replacement motherboard for the Polaris C2-6-10.