Neat work. Airfix did the same with the flap actuator cover on their earlier Mk22/24 - a small irritation, and easily remedied, but could have been moulded closed, or as a separate part - and I'm not sure if the shape is correct anyway. Earlier Spits had covers with a rounded end, opening sideways, but I haven't been able to get a close-up look at the Mk21 onwards version.