Referring to DWG 25 I noticed that the F-721B side rails had already been drilled to the longerons. I trimmed the F-757 gussets to the shape required by my canopy and tried them for fit by sliding them into the slot in F-721B. I filed and radiused the outside edge until the pre-punched holes in the F-757 matched the holes in the F-705 bulkhead.
Removing as little metal as possible I drilled and clecoed the pre-punched holes to fix the F-757 in position, then drilled the holes through the longeron and the outboard portion of F-757. Then I riveted both side rails, canopy decks and gussets to the longerons and carefully filed the decks and rails to fit the contour of the side skin.
Time: 8 hours.
Leonard's RV-7A Build 