Developing Flight Models?

[WhiskeyWhiskey]

I don't know what it all takes to develop a flight model and functioning aircraft in IL2, but what about developing a variety of models of existing aircraft?

Is this just as tedious and complicated as developing an entirely new flight model, or is it relatively easy?

For example, if you wanted to implement the A-36 Apache. Which is essentially a P-51B with small wing pylons and dive brakes, and a change in gun configuration (2 in the nose).

Or other configurations, something like a P-47N, where it is mainly the ends of the wings, and performance change?