My rudder trim tab is a piece of thin aluminum 4x6. It is bent at 2", so 2" sticks to the fabric with double sided 3M foam auto trim tape, leaving 2"x 6" bent in the wind. I also put a piece of contoured wood over the part stuck to the fabric to make it look better, but I'm not sure that was successful. The vertical center of the trim tab is located 29" up from the bottom of the rudder (SS7).