Finally I had a chance to play with F93.
Characteristics: Overgip + dampener = 336gr. 57lbs yonex 850 pro.
Started playing with Yonex in 2007 RDS001 midplus (was my favorite for 2 years), XL 95 (control), then played with VCORE 98 (till it cracked in the middle), vcore 97 (310gr, 1 year, injured my elbow: both tennis and golfing.), switched to RDIS 100 midplus (about I year, liked a lot), tried RDIS 93 (liked it but too heavy), last year VCORE 95 customized version (excellent, but a bit too heavy as I spend up to 8 hours a day and my elbow was injured). Last month I played with G97 (very stable and good balanced). Basically we try any new yonex rackets as my son plays on pro level. I had a dream to have a racquet with the weight of vcore 98 with vcore 95 precision, feeling ability as vcore 97 and less power as rdis 100 midplus. Last 2 days I played with F93. Elbow pain is very critical criteria to me. The head size is not a problem at all as it is very close to 95. Very low power level. Very good balanced racquet with a lot of control and precision. I really enjoyed playing it on any position, especially volleys. It reminded me XL 95 (290gr) with more weight. Serving was close to vcore 97 (310). Excellent! Slices perfect. Played 5 hours and always monitored my elbow. After one day I have no pain in my elbow! My opinion it is a very special racquet with the ability to add more weight and to be customized according to your habits. I really enjoyed it. No regret buying it.