I’ve just acquired a “used” M1G (it was mounted on a wall, but never actually installed). Everything was still in boxes, terminal blocks in a bag, etc. I was just wondering how old it might be. I just installed ELKRP2 and everything set up just fine, with default codes, etc. This also gave me an indication of the firmware versions: Boot 3.3.6, Firmware 5.3.18, hardware rev .13. Serial number is 96XX. In checking things out with ELKRP2, only the Firmware had a newer version (3.3.6) which I just upgraded to. All this tells me it’s not too old, unless the mainboard firmware was upgraded at some point. My question is: What do these numbers tell me, especially the serial number and hardware rev. Not a big issue, but I’d just like to know the approximate age. So far, I really like what I’m seeing in terms of programmability, and I’m learning!