Hi guys! just wanna ask your opinion bout the weight of my rackets. me and my brother have nanospeed 9000s, 8000, 7000, and my recently bought 7700 (from mustafa singapore). when i tried to test all 4 of them and use them on actual play, i feel like that the 7700 is significantly heavier than the rest. am wondering how could this happen, since all of them is 3U G4. was i ripped off on my 7700? or is the 7700 really heavier than the rest? thanks in advance!