Fit the left F-717 longeron by twisting as described in plans and trimming end to fit against F-704. Marked end per plans to drill to firewall. Drilled F-717 on drill press then clamped in place and match drilled to firewall bracket. Repeat process for right side.
Did the layout for the left F-684 gusset per the plans. Used dashed lines for the bend lines, solid lines for cuts and drill lines. Drilled for the inside radius, cut on bandsaw, and finished with dremel sander, files, and scotchbrite. Used rivet fan to layout holes per plans. Trimmed end on bandsaw and edge finished all around.