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Does anyone know the exact length of the 1/4 AN bolts that are required for the Skybolt, the ones that pass vertical through the front and rear spars on the upper and lower wings that attach the "I" strut to the spars? The exact AN-4 - ? Would be much appreciated! I would think Steen Aero Lab would know? Also When I rigged it prior to cover I have one large area washer a AN 970-4 in between the "I" strut and the wing spar, and I am aware that they can be removed or added to, if necessary to get the correct wing incidence. Dave