I've made good progress installing the roadbed. Let's define 'good progress'. It means that the road bed for the first of three planned loops is almost complete. Once that's done I can starting running wire and laying the track for the loop.
Soon I'll be able to at least run the train around the layout, even if there is still a lot of work to do.
I can't say enough good things about the roadbed from the California Roadbed Company. If you are trying to cure a noise or vibration issue, the California Roadbed Company's Homabed road bed is a good product.