i made these plywood side braces, that based on the plans, give a range of 1 and 3/4" from the wing tube center and aft. this also has two holes for the rear pins of the wing, so it helps to further support, using a square, i drew out the range towards the top of the plywood braces, and then i drilled holes from the center of the wing tube and aft to that point by 1/4" increments. when i used the hole that was furthest back on the range, the airplane was nose heavy slightly.