Laying the track on the board, at this point I know my wife would have looked at the wires and she'd give me a look and I'd promise they'd be hidden...

So time to cut some holes in the board and add some bracing and get the wiring underneath.

The gaffer tape (and clampage) is holding the wood whilst the glue sets - I don't consider Gaffer Taoe as being "load bearing"

The turntable is now embedded and all wiring out of site. I can feel the warm glow the lack of visible wiring would have impressed in my wife. 

Check trains can navigate the curves easily.

If Queen Elizabeth can get round with a set of Mk 1s then we should be able to manage anything I wish to run round.

The controllers are sitting on a wicker-box at the side of the layout at this point; that's not a long-term plan...