Thank you for the photo reference! The kit's headrest is a separate piece. It seemed unusual to me with that scalloped section.

I am building Sword's G.55 2in1 1/72nd kit. My knowledge of the G.55 is pretty much 0. The rear of the hinged canopy confuses me in relation to the shape of the fuselage spine. They obviously do not match each other. Is there framing at the rear of the canopy that closes it out to match the spine?