I've seen a lot of miter jigs for table saws, and most of them look the same. One commonality is that they always only allow for one piece to be cut at a time. What I was wondering is, why not cut both rail and stile at the same time?? That would guarantee that those two pieces would fit together at 45 deg. every time. It would also increase productivity. Below is a picture of the overall concept design, and the second picture shows how the rail and stile would overlap to allow the simultaneous cut.
I'm open to ideas and suggestions on this design before I build it.