The back ordered parts have still not arrived, possibly a combination of Christmas mail and the French security clamp down. But I did do some work today on the deck:

The deck still doesn't rotate on the outer track because I am waiting on the brass bearings to hold the wheels. However, the 20 walkway supports have been added. The first side was easier than the second side as the whole structure started to become a little unwieldy. Plenty of solder was used and some clean up will be required later, once all the additional pieces are soldered onto the deck.

I will then need to add the locking levers and guides but I am far from sure as to their exact location. I may have to visit some preserved turntables before proceeding further. The next step should be to add the wheel frames once the bearings have arrived. So it looks as though there won't be much progress before the end of the year.