The F-656-L&R gusset plates tie the F-706 and F-707 bulkheads to the main longerons. I clamped the gussets to the longeron, clecoed the gussets to the bulkhead and used the pre-punched holes to drill them to both the bulkhead and the longeron.
I decided to wait until later to rivet them.
Time: 2 hours.
Leonard's RV-7A Build 