Yes and Yes have been scoring well the last 6 sessions a 641 is my low set, average is 222 during this time. One set under 600 a 580 series in the last 3 months, about the time i slowed way back on buying a ball or so a week.
I honestly think it is because I am throwing the same balls over and over the last few months, also been trying to work the inside of the ball as Randy said on the PBA telecast.