At the maximum flap of 15º, the tie-bar, which is underslung by 3.5", moves away from the centerline of the mast by 0.9058". The movement of the tie-bars, which are at 120º azimuth from the above tie-bar, should move toward the centerline of the mast by 0.9058 * sin(30º) = 0.4529. The drawing shows them actually moving by 0.4565" toward the centerline of the mast. This is a discrepancy of less than 1% and it should therefore present no problem.

As a theoretical check, if the tie-bar was at 135º from the tie-bar 90º azimuth then the move toward the centerline of the mast should be 0.9058 * sin(45º) = 0.6405. The drawing shows them actually moving by 0.6430" toward the centerline of the mast. This is a discrepancy of less than 0.4%.