Thanks are due to Dale Dawson, Rohan Fergusson and Steve Jewell.
Track is Peco code 124 with a few lengths of code 143 and some Atlas to make up the shortfall until I get some more packs of bullhead. Out in the real world of course the rail height matters little ( just fabricate some soldered matching sections). I chose to go the bullhead route because there was little in the way of experience I could call on in regards to use of the flat bottom under our conditions. The rail fixings are more substantial with the bullhead track.
Here is a shot of my railmotor passing a steam hauled suburban set. The carriages are not my own work, they are some Ron Fox kits I assembled. I will have to take care not to use them when it is hot. My experiences with urethane in gauge one had wagons sagging with the heat.
A long way to go but at least the trains are now running. I might even squeeze another circuit in one day for use by those with clockwork and 3 rail. It might have to be stud contact given my aversion to solid third...... but then again it's outside so maybe I could live with it.
Already I see things I would do different. Halve the size of the layout to start.