I’ve done everything within my power to create a Human Powered Vehicle , based on an upright bicycle. (Not a recumbent).

I’m sorry, but your question has to be more specific. I always try to maintain excess capacity, if that’s what you mean.
Cargo version has 6 times more cargo space, but doesn’t give much aerodynamic advantage.

(Edit: yes, I was kidding about becoming a “weight weenie”).