If that is the part that that gets pop riveted on the sides, make sure your canopy roll over bar is bolted on. Once you rivet it on, its very difficult to bolt on the roll over bar. Also make sure your side skins are all riveted. Ask me how I know...
I couldn't find when in the plans to rivet it on, so I took it upon my self to rivet it. I regretted that decision pretty quickly. I wound up having to grind down a wrench to get it to fit and it took me about 3 hours to install the 3 bolts on each side. Im also missing a rivet on each skin, I haven't decided what I want to do there, probably just put put a countersunk pop rivet in.
Anyway, I hope you learn from my mistake.
Emp and Wings done, working on Fuselage.
Born to fly, forced to work