It wouldn’t take that much guesswork, but, you’re right about switching out the avionics like that, I get your point on that. Switching out the avionics would be a lot of work for them.
The flight dynamics on the lower weight of the airframe would pretty much come out in the calcs, though… Given I wouldn’t be buying it from the Marketplace, I or somebody can do the updated flight dynamics with or without Black Square.
It’s such an iconic / controversial plane, it’d be worth it. Just look at all that’s been written about the plane.
Just like Jorg said, that’s what the simulator is all about, giving people the chance to fly planes they never or could, or can’t.