As stated many times before, hang the plane by the leadouts and see how it hangs. The wings should verticle to the floor when view from the front. The nose of the fuselage should be a little nose down when view from the top or the bottom. On my Primary Force I had to add a washer under the front lug when the Fox was on it. With the LA 25 no offset on the engine. Have fun, DOC Holliday