So - that's it... I'm done. It's funny - I only wanted to add a bottom view but ended up reworking almost the whole frame because I felt the overall height to be too high and the wing/main body proportions to be somewhat off. But now it's finished, and quite honestly I'm pretty satisfied with it. It looks sharp and fast (at least to me). What do you think?
And yes - this is finally the end of my drawing time! I already made contact with a friend who's a 3D artist from Volkswagen... He'll help me visualize this baby.