Another day with very little work on so I got the dome glued to the top ring, no wheels yet. It's got 2.45meters of head room and 1.85meters internal diameter between the inside ring edges and is looking more like the goods now. Still need to add internal reinforcing to the dome and some extra bracing to the frame but that should only take a day with a saw.
Also tested my wheels idea on an offcut. I'm going to route them into the turntable to reduce the gap between the top and bottom ring. Cut up some 6mm brass rod for axles. Looks like a worker
No Geoff it will never clear up now, although the days are clear, got a touch of sunburn today.
Doug, at least I'll have some where to set the stuff up. It's still all packed up since the last trip away in early September