pittsman,
I talked with Eric and a few other guys there this past weekend at the Henderson KY fly-in about the Sig Rascal and you are correct that the B&B Specialties exhaust diverter is about the best I've seen and that's what will be going on mine. Here is a video I shot of the Rascal at work.
http://media.putfile.com/Sig-Rascal-...rson-KY-Fly-in