Late September testing of the 0.7 version jetpack. Flight reveals some areas for improvement. The arm angle was way off, as well as the arm length. Axle housing mounted too high, seat a little far back. Day two modifications better, for some elements such as the vest, it was back to the drawing board. Good in concept for floatation and positioning, but ultimately to secure for the body and preventing the necessary freedom of movement when still in the water. The modified aircraft buckle four point system was good for salt water exposure and ease of use, but the opening flaps caught the force of the water and defeated the purpose! We took all of the input as well as tester interviews and went back to the workshop for version 0.8..