ORIGINAL: stuntflyr

They aren't insurance companies, Brian.

AMA is the sole sanction for competition relating to competition in the USA for model aviation represented through the NAA, which is the official aviation sanction as the US Aero Club of the USA for all national and international competition and records to the FAI.

SFA was an alternative to the AMA and had their own competition rules, but were not the official US sanction to the FAI for competition or records, international or national. Even so, they both did have their own Pattern sequences.

These must have been different enough to make Joe Bridi draw up and market three different ships!
Chris...