I started by drawing lengthwise centerlines on Auxiliary Longerons F-713-R&L. I then trial fit the longerons between the firewall brackets and the F-704 bulkhead. To fit properly, the longeron had to be twisted slightly and the aft end had to be filed at an angle to butt against the F-704. I clamped the forward end of the F-713 and wiggled the aft end until the centerline appeared in the pre-punched holes in the F-770 side skin. I then drilled and clecoed the assembly.
Time: 2 hours.
Leonard's RV-7A Build 