For the past 5 years I've used the 6.1 tour and then switched to my Prokennex at 12.8oz strung. I've gotten so used to swinging at this weight that now I think it's too light, I'm thinking of bumping it up to the low 13 oz. weight range. I already have a fast swing speed at 12.8oz, almost as fast as most people who swing fast with a 11 oz. racquet. I really feel like I need to bump up the weight so I can swing normally again, not too fast. Any suggestions? Keep it the same or add some more lead?