Simon.
I have enjoyed studying you amazing latest drawing of the main engines. As mentioned to you, I have some minor remarks knowing your are keen on details.
It looks as if you have made the nameplates at the maneuvering stand of brass, they are of aluminium. See photo.
The inlet and exhaust valvestems have a lockingwire on the valve clearance nut. See photo.
The lever for the supercharger clutch/natural aspiration rotating inletvalves is missing. See photo.
The handle for the main starting airwheel is missing. See photo.
The counter for the revolutions on top of the lube oilpump is, as far as I can see, missing. See photo.
As said these are minor details probably known to you and may be you have decided to omit same.
Tore