Mine started life with a Saito 100, but was an absolute dog, switched to an OS 120, removed 10 oz. of weight from the front end and am much happier. Mine has the stock 3 degrees in the wing and does not climb at any throttle setting and the 120 will really pull it along. The only thing I dislike about the plane is that it takes forever to slow to landing speed and on a 300' paved runway, that can be a real pain.