Now i have takled it out a little bit more and at least i got my different models working with Jeehell. In general you can say, that the visual model is farely independent from the aircraft.cfg and the *.air file for the particular aircraft. BUT...,and this is an important but, in case of the visual apearence of the controlsurfaces, there is a dependency, of course. This means, that in theory any mdl-file, which works in P3D or FSX, can be used for the Jeehell Aircrafts, like the Aerosoft ones, but you have to exspect issues with the visual apearances of those parts of the model which are defined or even controled by the aircraft.cfg.
Because of this i have collected the different models for the A318 up to the A321 with CFM and IAE eninges which where desigend by Project Airbus for FSX (those are the only ones that P3D can work with instead of native P3D models which were never developed from PA)
Now i have the different visual models i need for my Lufthansa/Eurowings fleet. Therefore i had a need for two different models for the A319, one with the CFM and one with the IAE engines. Because Eurowings has the A319 only with IAE in use and Lufthansa with both engine-configuration. The A321 is used only by Lufthansa with IAE engines. And the A320 by both carriers with only the CFM engines. The most timeconsuming part was, to get the right FSX-Models by PA and of course the corresponding repaints of those different models.
But at least i have it in my hangar now and especially the Lufthansa A321 with IAE engines is a real beauty with 2048x2048 textures. The repaint was done by Phillip Hughes as i know. But there is another one by Stefan Bree for the D-AIRK.