I visited Mike Bennett this afternoon and he kindly welded up my cage. It was damaged so long ago that I can't remember exactly how it broke. Probably the last flight out of Chatfield. Anyway it has been splinted with a brass rod , zip ties and duck tape for a long time. After the welding we looked at the chase cam and Mike spotted a deflection on the fins inside the bottle which was probably causing the swinging motion. His suggestion was to take the fins off completely.
Mike is building some very light cages to mate up with Leon Wacker frames for the "Drift Innovation PPG Team" . Drift is sponsoring them in a big way having purchased 4 wings and providing drift cameras.