Thanks very much Guys!
Well Iv'e added the yellow ID colours at this point.
I personally believe the lower cowling IS yellow, in the only known full shot of this aircraft the lower cowling certainly appears to be a brighter, different colour to the other lighter colour that can be seen on the fuselage, undercarriage cover etc. which is without a doubt RLM 76. Lt. Blue or Blue/Grey.
I have done the rudder yellow at this point based on the Profile from the Mushroom book, which is also a possibility, however I am not quite sure of this yet however the yellow is easier done now than later and can easily be overpainted if I choose....
the Spinner has been painted Black while the prop blades are RLM 70, they look greener in the pic...but are darker.