I have recently got a new coach who analysis my error and improved it so basicly my error was i was too much of an attacker so i smash every time like no drop at all so i work on my drop and when i got on with my drop i prefer voltric 80. Then my return of smashes is not strong so i work on that so i prefer head light racket. So i think you get what im saying. So then i was using my coaches racket. before that i was using voltric z forces i dont know why i keep changing. At the end of my summer holiday training i found kason c7 was my favourite. Anyone experienced that. Also change in tension for control as well. Im still a student so i was free for whole summer.