I scotch taped 1/8 in. bamboo across the front of the wing leading edges. Without them, if you drag a tip, the wing will snap at the strut. For the landing gear I glued the plastic stiffeners with the edge at the leading edge of the wing. I set the CG so that there is no trim change upright or inverted although everyone has they're own preference for that. Sweetheart to fly on a dead calm day