I just finished all the final balancing and control throw adjustments on my LT-40 about 30 minutes ago. I checked the wing balance with it mounted on the plane. I will have to add 2 ounces to my left wing to get a proper balance. I plan to cut open one of the holes in the wing tip, tape and glue the weight inside then cover that wing tip in red for better visability. I could cover the hole with the original colors but the red will give me a reference while in the air.