Yeah, I've thought about a brace attaching the two halves. With the way it is now, it wouldn't work. They fit so close to the bow, the brace would hit your thumb on your bow hand. I might could make it work with a bottom offset bracket, or if it was an arc back toward the string instead of straight.
I heard the guy building the Kanatis had another business that was his main income and it just started taking up too much time for him to run both, but not positive of all the details.