I think I could be interested in something like this. I always ride solo, never once with anyone and don't really plan it. My wife won't ride with me since we have four kids and she couldn't see it if we left them without us.
My problem is that I need a lot of storage (planning a long-term large mile tour). I was thinking of setting up my FZ6 as a sport tourer with complete tail, and saddle cases. Basically Givi, E52 Maxia and a pair of V35s for the saddle bags.
I'm absolutely sure the top case/ rear cowl you have will have less storage than the E52; however, I wouldn't have to buy the Givi Trunk/Tail metal setup + the E52, which bring the price closer to in-line. That - and it would look a whole lot better, I suspect.
The question is, would I be able to still do the side saddlebags/cases with the cowl trunk that you are developing? My first inclination is that this would in fact work.
RhadamYgg