I have changed gripsize one down to 1/4 which feels great on my groundstrokes but it twists alot on volleys. I can hit volleys but I have to hold it much harder to not twist. I feel the same in the serve. Building up gripsize alittle bit doesnt help the twisting and my groundstrokes affects really bad. Should I try lead tape on 9&3 o'clock and how much grams do I need? I dont want the racquet to become so heavy because I like the light feel on groundstrokes? Or should I try something else? Please help me out!!!