Thanks for that. This panel was already in situ with a client where we were carrying out a load of other work and I recommended the addition of several zones on the site. One of our guys was very familiar with this panel (duh!), so we did the biz; two radio PIRs, test, commission and it all worked like a dream - seriously, that is a top notch panel. Quite rightly, the decision was made to bring it up to the latest S/W (we do this on everything else, including NVR's, cameras, IoT, etc) to 7.07.01. We are where we are, and the client thinks the panel is around 6 yrs old but can't be sure. I've left it totally power-disconnected over the weekend, but I don't think that will change anything come Monday.