Got the F-719 longerons trimmed, fitted and drilled over the last few days, including fabricating and fitting the clips the attach these longerons to the firewall. There’s actually a mistake on these clips, and I had to redo them. Can you spot the error.

Clamped in place for drilling…

…and clips are drilled. Rather than peel back the skin, I measured the correct distance on the firewall stiffener and marked/drilled the hole from the interior. Worked out fine.

Looks pretty good with the longerons in place…