Game: Men doubles attacking style I have the Yonex Voltric 7 (medium flex, head heavy, 4U, strung @ 24lbs) since 2010/2011 but could not utilize a head-heavy racket well as my technique/strength were not great back then. However, now I have noticed that my smashes, clears and drops are much better after some practice the last few years. I'm really liking the amount of power (and the lovely sound) I am able to generate with the Voltric 7 compared to the Duora 7. Currently looking at the Astrox 7 or 77 as they are medium flex and head-heavy. Was wondering if it's worth the upgrade or I should just continue to use the Voltric 7? I do not think my technique/strength is enough to use a stiff racket yet... p/s: Another racket that I have is the Duora 7 which is even balanced.