thnx for cheerups! I got a daytime job so I only have time to work on it in the evening. 
Yes, it's gonna be variable.. and yes those wings are a problem.. 
I'm gonna make a test model first and see how i can technically solve the problem. 
As for the wings, I think im gonna try to make it detractable. (sorry for my  bad english... you know I meant by the way of sleeving in and out on particular parts)