I love no shelf bows and have made a number of them. I've also made a number of take downs... just never combined the two ideas. I use the connexion hinge system, which to me is the easiest and I can't see any reason not to make one shelfless. in fact, I'm sitting here thinking about converting my favorite one as I type... Don't know why I never thought to do it! Pat B's idea with the sleeve would work, too, just a matter of which system you're more comfortable building to.
You can find info on installing the hinge on my pages:
www.dickwightman.com click on Archery Activities
If you go to the Gallery, check out "Look at Me" and "Roadtrip" ... both shelfless