Layman's thinking:
if the standard CS textures do not have this issue, there should be a way to fix it...2 main paint-kit files is pretty much the standard (along with 3 main files for some models).

And also, while you are at it, could you reduce the shine on the underbody and particularly on the wings ?

Alternatively, could I reduce the shine myself by changing the alpha layer ? Which files for the wings ?

Thanks a lot.