Fit 6-B-21-5 Saddle to top rear of fuselage on top of the stabilizer. Trimmed to fit. Had to insure that the Saddle was positioned so the rudder was perfectly aligned longitudinally with the fuselage. Formed angles to attach saddle to the top rear of the stabilizer according to drawing 6-S-4. Trimmed top of saddle to establish up elevator travel imit.