The term "airfoil shape" is now being used. To me, this implies a leading edge that then widens before tapering back down, like the wing. I had been following the directions that came with the kit. Those directions do not mention an airfoil shape. Rather, they say to sand from the trailing edge of the rudder to the leading edge of the fin. What this produces is a flat surface that would appear as a wedge if viewed from the tip.

Do I need to restart the fin and rudder from scratch?

Thank you,
Richard