Finally got around to trying to correlate the blueprint scans with full-scale internet map data. Here's the result so far:

I'm happy with the size, and surprised at how close I came with "eyeballed" engineering.
I need to tweak the dock a bit more, as the dock edges have two different outward slopes. Need to shorten the float bridge, too.
Looks like this Free-moN section will be just under 4 feet long. Hoping to have it something up and running by mid August, which means more track laying soon.
-Dave