All round access is vital when working on the Archive Project models. You really need to be able to get to all sides of the model to work on the various mechanisms.
After a chat with a couple of twitter friends @concretedog and @workshopshed we settled on the idea of a Lazy Susan. In my youth I had seen these being used for cake decorating. Next stop eBay.I ordered a Turner’s 350mm diameter turntable which claimed to be able to take loads up to 250kg. Plenty.

I cut a circle from 12mm ply and screwed it the turntable.Flipped over it looks like this and is ready to go. Sorted. Thank @concretedog and @workshopshed