Ken,
Your original version of this was my inspiration to go and buy a ton of track pieces.... Still need to find yet more 1 3/8 track pieces, and still some switches. Happy to see there are more O-36 switches in the latest rendition, as I already have a few of those. I do plan on building a U layout as you had mentioned you had a plan for that aspect as well. Cant wait to see the outcome of it once it comes to fruition.