I am new to this forum and found it while searching for info on my 45 year old Hobie Positive Force.
I custom ordered this board at the J.Rich Sporting Goods in Houston Texas in 1969. It was the last surfboard that I have owned and I surfed it in Texas, Mexico, and So.Cal. But in 74 I got married and we moved to Oregon. She has traveled with me cross country from Texas to Oregon and through my four homes in Oregon. Despite all the moves she is still in pretty good shape for a 45 year old ;^) and she has not seen water since. I think she is a Phase 1 as she as the W.A.V.E Set fin box. She is 6' 10", 10lbs.
If anyone knows more info on this vintage of the Positive Force, I would welcome the information.