Milled the pieces for the rudder and glued them up. The dimensions are supposed to be from 1 1/2" on the leading edge to 3/4" on the trailing edge. I used a hand planer to mill down the pine blocking, and then a grinder and orbital sander. The finished dimension is from 1 1/2" to 1". I don't think this will make any significant difference in it's operation.
My Journey Building a Pocketship.