Can't believe it's a year on! How did your discussions with the Thamesiders and the home family project go?
In the last couple of months I've built a couple of double modules close to Aussie Mini T-Trak N standards. Each module is 618mm x 186mm with the main 30mm from one edge. The slightly wider (than 150mm) depth is due to not wishing to spoil some existing ply used for the tops.
I've also added height adjusters, just in case they can be used in a modular set-up.
The design is for a car cleaning facility with RIP line, notionally in the yard of a disused depot, that can double as an Inglenook type switching layout.
The impetus came after after setting up and breaking down another small, but more complex, layout at the Wealden Show on 10 March and wanting a replacement for Mahwah for the NGS Worldwide Group Convention on 21 April, so no pressure!
The modules have been designed double-sided, ie a through line at front in a modular setting, or using the main as a rear fiddle yard in a stand-alone/home switching context. Since the WWG Convention I have added loose sky boards that can sit in 'U' section plastic channel on either front or rear and which is also useful when the two units are boxed face to face for storage. The basics are done but vegetation and more detail is yet to be added.
Electrically, the layout has two sections and I am using a Medvend controller with 9v PP3 battery for track supply and 12v dc with (on)-off-(on) reversing switches for the KATO turnouts, but ultimately would like 100% battery operation with radio control. In modular format, the switching yard can be operated separately to the main.
I also have in development two boards (again recycled) that could be used for 180 degree turns, albeit using 216mm radius curves, that will give the further options of 'U' or 'O' formats. One of the boards is likely to be a take on the Red Caboose Motel near Strasburg, Pennsylvania.
I will check out how to add a picture and a track plan.