Hi bro...right now i using Yonex Carbonex 21 special string BG66UM 27Lbs. but after i play with this racket , my right hand elbow was hurt...it is mean that Yonex Carbonex 21 special is not suitable to me and need to change racket??? ... right now i using my friend racket Gosen FP pro 88 string BG66 26lbs... very comfortable & easy to smash & deffense... should i choose / change racket gosen or need to adjust setting yonex carbonex 21 special?...for your info , i am medium player.....really need your advise & recommended racket suitable to me....Thank!