The airfiles respond characteristics where modified.

I downloaded many airfiles from other developers ( 757 ) and compared them.
That whas my starting point.

After that it was trying and adjusting.

When trying you will see that the 757-200 versions respond a bit quicker ; that is because the 200 and 300 versions have the same engines, but the 300 version is longer and heavier.
So the 200 is a bit overpowered and can climb at a steeper angle.

I also took the anti-rocking solution from this forum.

All together I think that with this and the new VC cockpit textures the aircraft is getting better and better.

At the moment I am experimenting with the engine sounds ; I implemented the FSX Sound Cone technique and am working on that.
When moving around the aircraft you will hear that the engines sound different form where you are standing.