I don't think it matters if the rotors are too close to the fins. I imagine this warmachine moving and changing just slightly as it moves and flies, like a transformer, but still maintaining closeness to its original shape.
Awesome work as always man, hey you check out scott robertsons books at all? I got some off amazon and they have some REALLY REALLY great inspiration for specifically vehicle designs. I see the work in there and I think of your work. especially illustrated here. A ground mobile helicopter, very interesting concept.