I had actually thought that the current lettering already looks way too clean for this aged aircraft. I used some existing cockpit pictures as a guide.

Unfortunatelly I can't paste pictures.
Few small details for the better explanations what what I mean.
- There is may small scratches on the panels for instance between the "Pos. Lampen" and "Instrum Bel." switches.
- The floor looks very very worn.
- The frame of instruments (the altimeter, Radio Compass etc.) is not a clean black surface, there are many white / gray worns on it.
- The magneto swicth looks also the same, and the M1+2 M2 labels are yellowed or paled.
- The knob of the Mixture also seems rusty.
- The interior leather cover seems very-very old and dirty.

Please don't misunderstand me, you did a great job, only I would like a less realistic but a much cleaner and less used interior look of the cockpit. If its possible.
Thanks!

Ok I understand. But this is a completely different project with a lot of effort to rework all the cockpit textures.

Until the end of february i have lot of free time, If I can help somehow, just tell me what to do.
I don't have experience in PhotoShop, but I'm a mechanical engineer I worked with a few different 3D modelling CAM software, maybe I can help to clean the surfaceces or something like this, if I receive a short instruction from you. If you are interested in this project just let me know, do you need my e-mail address?

No thanks, I am not interested in doing a mod to modernize the cockpit.