Hi John,
Thanks for the compliment, 7 cylinders gives me some extra weight in the nose. I have also eliminated tabs off the ring in an attempt to widen that gap. Sounds like you hit the right ration of air with your baffle system. The guys in a radial forum said I need to block air flow between the cylinders to baffle the air across the cylinders. I've asked for photos cause I just cant picture that in my minds eye or how I would mount that.