This thread actually made me look up the Free-Mo activity in my area. Whenever I see a Free-Mo setup at a show, I'm impressed by the way it all comes together. With fewer constraints on geometry and track arrangement, these layouts seem to show a lot more creativity.
Thanks for putting this photo essay together. Can we get a look at the underside and the wiring standards once it's done, to see how the Free-Mo concept implements connectivity?
The diagrams I have are .pdf files, so I can't post them here. A basic description for HOn3 Free-mo follows (more can be found at the NSNG, Free-mo, and hon3-free-mo Yahoo Groups):
Track/Power bus: red and black wires (12 gauge) running length of module. We use NCE DCC, HO uses Digitrax. At the module ends, 12" pigtails are made with red and black Anderson 30 amp Power Pole connectors (HO uses Clinch Jones connectors in a similar configuration). The red PP always connects to the right hand rail when looking at the module end. Black PP attaches to the left rail. During setup, red PP connects to black PP, and everything should work well.
Within the module, we require a circuit breaker between the red/black bus wires and track feeders so a short only brings down the module, not the entire power district. Usually this is implemented by having a local track bus connected to the main track bus through the circuit breaker. The bridge rails have insulated rail joiners on one end.
Accessory bus: a very recent addition to our standard, we have a 12V DC bus for running Tortoise switch motors and other accessories. We found every module having its own wall wart wasn't working in many setup venues. HO Free-mo has a 16V AC accessory bus, with trailer plug connections. In HOn3 we use blue and white wires - blue is positive, white is negative - and blue and white Anderson PP connections to link modules. Unlike the track bus, the accessory bus always keeps its color. Blue PP plugs to blue PP, and is always positive. A fuse or circuit breaker is mandated on each module between bus and accessories - again to localize any electrical issues.
Throttle bus: standard 6 wire cable runs length of module. Jacks are required on each side of every module, more if module length warrants. We use standard RJ splitters to feed the jack panels. A pigtail with 2 male connectors links the modules at the ends.
Our end plates have hand holds cut out in them. Normally, we pass the inter-module wiring through the cutouts.
In addition to the above, HO Free-mo has an optional signal bus. Modules without signalling can very easily implement the signal bus as a pass through to signals on other modules.
The other great aspect of Free-mo for me has been uniting with other model railroaders to solve problems and conquer issues together - much like a good club.
I hope this helps answer some of your questions. There is a lot more posted, especially in the various Yahoo Groups.
And thanks to our OP for his photo essay. Just the kick in the pants I needed to get excited about getting on with my pair of HOn3 modules (Upper and Lower Elk River Canyon).