I might also try simulating this scenario in Universe Sandbox, but:

Something is causing the orbits of the outer Kuiper belt objects to be elongated. I wonder if perhaps they reach a mid point, then go back into regular orbits around the binary star. (So in the diagram, that planet on the right is the outermost planet of the binary.) If you know what I mean.
This diagram isn't the best, there are a few things I'm still going to change to actually show the transition area.
This post was edited by Torm1 on Feb 29 2012 09:07pm