You're right about the airfoil thickness, Dick.

I remember that when Pattern planes were ".60 size", we used to think that 15% thickness was normal. A few years later, I started using Eppler airfoils (E168) in the 12% to 13% range. Now, having recently measured some modern Pattern planes myself, I find that thicknesses are typically around 10%.

I assume this is a tribute to airfoil precision, light construction techniques, and the changes in maneuvers we've seen over the past few years.