Wiz Kid Qua-Fiki has designed a change bag specifically for performing the Mis-made Flag (or any other mis-made silk type of trick). It's described in The Wizards' Journal #22 on my site. One advantage of having a special change bag that looks and works nothing like the "traditional change bag" is that it allows you to use both in the same show (I don't advise one after another, though). His bag is called a "See-Thru Change Bag" because it is mostly made of mesh, both front and back, so you can see through the bag and apparently see the silks "visibly" transform into flags (or whatever).
After watching him work with it, I am convinced it has other possibilities beyond silk magic and I have added some of my ideas to his e-Book.