I was talking to a friend in Japan and noticed that she has a Yonex tube called "New Official", or F-80. Then I looked on the Yonex Japan page and saw that their shuttle range is completely different to the rest of the World which is usually Aerosensa - http://www.yonex.co.jp/products/badminton/shuttle.html. I actually managed to aquire a couple of F-90s recently from the London Olympics and the one that I tried felt higher quality to my AS50s, but I thought it was just a special tournament grade. Does anyone know how the Japanese range compares to Aerosensa i.e. F-80 is the same as AS50, and is it possible to buy it outside of Japan?