Provide a possibility to change gear, doors, wing by pressing a key. This would make the models more authentic.

Basically a way to change the position and/or angle of a element. In my models i already included a way to build more than one model variant with one file (gear down/up, doors open, close) by using if clauses (See pictures).

I think I saw a video you made one a plane with landing gear going up and down, want to make a pull request for this? :)