Great progress, Daniel. I'm designing another micro right now similar to the Box Street configuration with the plan on integrating it into something larger at some point. Not 100% sure whether I'm going to do a pure 2-rail or a 2-rail/3-rail hybrid.
I'm also a fan of Carl Arendt's work. The trick with North American micro layouts is that the equipment involved is typically close to twice the length of their European counterparts. I usually look at the H.O. micros designed around North American equipment as a basis for O scale designing. I did a build for a Forum micro contest a few years back and put some pretty tight constraints on myself (minimum 48" curve radius) just to see if I could pull it off. Surprising what you can squeeze into 13 square feet (8'x19").
