Hello Steve,
This is quite exciting, I have been following this thread closely. I will definitely be making a purchase regardless of what you decide to make. I would prefer 9v track, but would be happy to get either one in order to have a nice large radius layout. I voted for 104, and my next choices in descending order are 88, 56 and 72.
When you say 32 sections per full circle, does that apply to all radii? For example, R56 sections would actually be shorter than the stock R40 sections?
-Kevin