Jim, we posted simultaneously there, didn't want to look like I ignored you. I'm restoring an old Akro with a rudder I could break off and re-glue. Perhaps I should break it off and get her running tangent, then when I find the rudder position that keeps her tangent, I'll know I'm close. It certainly is odd that a noticeable amount of yaw screws things up overhead. I wonder if that tends to occur when the "fight" I mentioned slows down the ship? Do people use visual aids like a little white post on the inboard tip? Then a dot on the fuse that would line up when tangent. Don