I finished it off in a couple of hours at the weekend. This is the end product.
The sleepering through the turnout is Scalefour Society ply & rivet build. The dark brown sleepers at the ends are ones cut individually from C&L trackbases.
The whole thing is stuck down firmly on my test-track/reviewing board. This serves the purpose of allowing me to look at a vehicle to see if it is "right", to test the fitting of the Sprat & Winkle couplings, and to see how it runs through pointwork. Not as good as a full shunting plank or test track, but a sight easier to have on a workbench.
There is a tie-bar fitted that I _think_ that I got from the Scalefour Society.
Although you can see it is soldered in place, I have yet to work out a latching mechanism. I may drop into Maplin tomorrow to see if I can find some form of surface-mounted switch that does the trick, possibly in conjunction with an Omega loop as well to take up the extra movement.
What to do next? Hmmm... Let's wait and see.