ahh you stole my idea about using a seat frame for a fake springer! I originally got the idea from a bike i had where the seat had completely rotted away and just left the frame. never did go any further with that idea though. yours looks good.
Yep, very nice! I too want to know about the rust(y look). Have a similar looking frame I want to rust away...
Where about are you in Germany? (Intro-section!)