How to foil pumping in the seventies ? 

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Just received a letter from the boss of Gong factory (Patrice Guenolé)
Foil was secret weapon launch in the early seventies, but destroyed after the vietnam war. This VHS is a unique proof of its existence...
you want to learn how to foil pumping , FantoSlate Er show you properly with style.
Gears:
Gong allvator with 65cm mast and XL front wing - Board DIY from Woody and Djaiph