[aerohead]

I'm still struggling with the original 'shape' of the the trike:
* the belly should all be on the same plane.
* the belly should not slant upwards towards the rear by more than approximately 3-degrees.
* the lower body, behind the front wheels should not have a reflexed surface at all.
*the lower body should just have a 'cambered' contour, like a fish, dolphin, falcon, the 'same' width as the upper portion of the body.
* the 'loose' fit of the canopy, compared to the body suggests that there would be some unwanted interference drag all around the gap, as well as the exterior surface.
*the volume of the wheelhouses seem 'enormous' compared the needs for 'wheel-flop' of the steering.
*if the front wheels cannot be enclosed, the wheel-arch-to-tire gap should be the absolute minimum.
* the wheels should be completely covered with shallow, convex, 'MOON'-esque wheel covers.
* a one-piece, slip-on, quick-release truncated boat-tail, would be the single-most effective streamlining addition you could make.
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In your apartment, a 'sculptor's' armature, covered in a slightly undersized papier mache ( wet newsprint and laundry starch ) 'buck', could be fiber-glassed to it's final dimension.
Once cured, and soaked in the bathtub, the 'buck' would dissolve enough to allow the composite shell to release, leaving you with only the featherweight fiberglass shell ( all the mods to my Honda CRX were fabricated this way ).
* if you use epoxy resin, you'd still need to ventilate your apartment, as with polyester resin, but there'd be no 'odor' and no upset to your neighbors.
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you may not get to Cd 0.11, but you'd get a lot closer.
just some thoughts.