Aha, I think I’m on the right page now. So it would have half-axles in bearings set on the frame legs sync’d with chains to the hub instead of a single spindle. That idea could get rid of any minimum inseam requirement even for people who can’t ride a Nightfox.
It would also let anyone ride a really big wheel while sitting at the minimum height possible height. I guess that supposes someone wanting to build and ride a 60+" wheel while also not wanting to sit at the extra height (what, maybe 30"?) that a giraffe/penguin-type chain drive needs. Which one is better depends on your point of view I guess. Sitting lower would help with bridge clearance for sure, and would probably be easier to mount and dismount. Less impressive in parades though.
Sewed any tires lately, Saskatchewanian? 
With the Game Changing Parts discussion going on, it makes me wonder if being able to buy great mass-produced unicycles at the prices they sell for these days might have discouraged most of the dreamers and tinkerers who came up with stuff like that. Maybe some unicycling-is-the-next-big-thing excitement faded away too. When I was new here, I spent many hours searching out and reading through old threads about those things. It seems like it all happened long before I started unicycling, with very little new in the 5 years since I joined the site. Too bad.