The spitfire mk1a that is in the game didnot have a rotol propeller, instead it was more like the mk1 with a dehavilland unit fitted.
There were 30 spitfire mk1b's that were fitted with cannon but were prone to jamming due to insufficient heating.
The throttle control unit in the cockpit is modelled on a mk5 and later unit and the mk1-1a-2a which didnt have the bomb release control fitted to it.
the landing light control unit is missing from the cocpit and should be positioned under the control panel between the compass and the throttle control unit.
there should be both two seperate fuel gauges where the one fuel gauge is and two fuel cocks as the spitfire had two fuel tanks, and a vickers pressure release cock to the left of the fuel cocks
also the coolant tank is missing and should wrap around the front of the spitfires engine( around the scew gear casing)
also the performance of all the spitfires that are in the game should be almost unnoticable and like the mk2a, at the moment the mk1-1a are underpowered especially on accelleration.
all the aircraft should have the controls activated for landing and navigation lights
the radio control unit on the mk2a should be the tr133 unit and not the tr9d which it currently is.
Here is a video that shows a mk1a being inspected.