I should have noticed and remarked on it when I built my MB5 Monsooooooon pylon racer.
The AZ MB5 kit has totally wrong main gear apertures, they're moulded circular, but the real thing had semi-circular main gear doors and triangular inner doors, as fitted to my MB5 Monsoon PR3 build. Quite how I managed to miss this on the Monsooooon racer I've no idea, but then it had no inner doors anyway, and neither does the AZ kit.
This MB6 Sea Monsoon will be corrected, just as soon as I can figure out how to do it....