In the bottom of the throat (where the throat comes together and meets the grip), I just added 5 grams (x2= 10 grams total) In the hoop, I also added 5 grams (x2= 10 grams total) at around 3:30/8:30. (The weight sits a little lower down then exactly at 3 and 9 oclock). So a total of 20 grams. What happened? Pure magic! I'm hitting this huge, heavy ball with insane amounts of topspin. The weight in the throat doesn't affect the balance very much but gives me noticable heft. I had to tweak my stroke SLIGHTLY. It only took 5 minutes. I played a whole DOUBLES tournament and I managed to peg 3 opponents.