The old 72 series panel was probably one of their best panels. Built to last. Although you open some of them up and a pile of sid boards or zone splitters would fall out in front of you. The other thing with Shorrock everything was always relays. I remember getting called out to a site and I asked the guy where his panel was and he said over there. It was a cupboard with a keyswitch and a couple of leds. Open the door and it was full of relay boards. What fun I had that night.
As for their newer stuff, I was one of the first to fit the 1600 panel up North along with the big 170 white basin bell box. Mind you it was easier and lighter to put up. 1600 had many problems to it like the final set button having a high resistance and locking out the keypad. 2000 & 2100 was an installers dream and a service mans nightmare. Easy for the installer to fit cats anywhere but try finding a fault when half your cats go RF failed. Had it once at a large supermarket was there most of the night and it turned out to be a cat that was no where near the circuits that went into fault.
Those were the days lol