Thanks all, I'm incredibly happy with the tank and have been spending a fair bit of time in front of it.
No issues so far, everything ticking over well. I was running an Eheim canister off the old tank on the settling chamer of the sump just to help with the bio load during the transition, I removed that yesterday and now it is accumulating much more muck. I also added a Tunze 6025 to help move the waste from the plecs towards the overflow, that was a bit of a wake-up call as to just how big the tank is, I couldn't get it anywhere near the middle of the back panel without actually getting into the tank! I've painted the spraybay with krylon fusion to try make it a bit less obvious and will be putting that back in tomorrow and might take some more pics then. And the temp controller a friends father i building me is finished so I should receive that in the next day or two.
The plecs are feeding well, I watched last night with the night light on and they all came out and forraged around looking for wafers. The four royals [surprisingly] seemed to be hanging around together in a group, though I did see two of them having a bit of a scrap today. Aro is eating like a pig too, might start trying to feed him some shrimp soon, he's never eaten anything but pellets so it may take some training!