I wish this was set up and I really push some stock through it, some day. I don't cut that many curved braces, but when I do this is how I do it. You need a new jig or sled for different braces. Simple to make and once it is made it is great. I cut the ends of the brace angles but don't form the tenon, it helps to balance the brace stock, cut the tenons after. It takes a little more than a couple seconds, each but not much. I use a push stick and the person on the other end pulls it through.
http://www.youtube.com/watch?v=lhPcsWsBNmY