You could do that, but I'm not sure you'd save that kind of weight. The best solution I've seen so far is the hoop stay idea. The large stay should fit just right in the regular pack. That said, that's a lot of work to put into saving about 3 ounces (based on my measurements). If you wanted to shave that kind of weight, then the Crown may not be the right pack for you.
Personally, I've decided that it needs to be considered a framed pack like the Vapor Trail. I just don't think it can go frameless.