Just the man I want to talk to !
I assume you also mean more enclosed then ? seat adjust ability is always nice and yet hard to do without being clumsy and adding weight . Mine tend to have a tool adjust of a few inches fore and aft of where I think the seat needs to be rather than accommodating drivers of widely varying height/leg length.Hi!
If/when MkII probably will have a more ”modern” touch. Something like Brads started velomobile fairing project or the above mentioned Quadvelo. And adjustable seating for 1,6(not so tall sweetheart)-2m(tall sons) riders.
Ah the Honey Do list , never ending .....But there are quite a few other projects to be done first, primarily related to the non-velocar part of life.