ultraman, Cleave,
I'm not Japanese but have practiced Iaido for over 15 years, and before that, Judo for 8. I love Japan.
My colnago is small, but not too small. That pic is right after it was built, and basically unridden. I now run a .25cm spacer under the stem and yes, when in the drops, have a flat back with a slight bend in the elbows. As I mentioned in the OP, weight distribution is 46/54. All of my contact points are right and would be the same with a frame one or two sizes bigger. Saddle tip to handlebar (center) is 57.5cm. Knees are 1cm back. I have a long torso so at this point, and until I get a custom frame, this setup works. As a competitive kayak paddler I have developed a strong core.
Anyway, thanks all for the advice. I was looking at an in-the-box Nagasawa but it was just wishful thinking on my part. Bummer...