I've enclosed sample shot of the canopy of the XP-38 with the production simply to get a close up of the opening mechanism as well as the side windows.
The models are from a modeler who has done a great job of metal finishing. It appears he's gone down the metallic paint road.
There are several differences that immediately pop out such as the chin radiators under the propeller, anti-glare paint, the propeller spinners are not as sleek, the turbochargers are different, radiators in the rear part of the booms are different, the canopies are different & so on.
So I'll be modifying the cowls from the standard J versions to something that more resembles a sleek F variant & go from there.