i thought i posted a response on the strings and tension on my fb already... i used the new ng99 on the highest recommended tension for this racket which is 24 lbs. great repulsion feel for sure. I have to point out that the increase in racket head speed has given me the confidence to attempt shots i wouldn't try before. for example if i am caught out of place and i have to reach for the back left corner (i am right handed) with a backhand i either go for a clear to the other side or attempt a drop. in either scenario i give my opponent the initiative to control the rally. but with the fb i am trying to jump back and attempt to smash the shuttlecock with a behind-the-head-smash in a straight line to his sideline. its not a powerful smash but thats not the point, because i am able to keep on controlling the rally. ...i hope i made sense. i really feel after three sessions already that this advantage in reaction and execution outweighs the benefits of a "cannon in your hands" racket. i dont think i will ever purchase a racket with a heavy head balance or heavier than 4U.