Well I suppose the modern-day replica is probably as reputable a source as artist profiles - they probably are a result of a similar amount of research (or lack thereof).
I think that two options are plenty - the gray rounded option as already on the model, and the straight gray strip. These are both known paint schemes for the planes with evidence supporting both. The overall green including underside seemed to be a supposition only. Remember the reason for painting them like these - from above the green would blend with the ground, from below, the gray with the sky. You wouldn't want it the other way around or you'd be spotted more easily.
But if you're going to make the change I'll wait for you. You're a lot better at this than I. Hopefully after this we can let Old Crow rest.
