I have a Gamma 5003 6 point stringing machine. I have calibrated it correctly to my knowledge. I used the calibrator where you put it on the machine and pull tension to verify. It pulls exactly what I have set on the machine. However, after stringing the racket, I measure the tension on the racket using the stringMeter(round dial instrument) and it reads 7 or 8 pounds tighter than what I strung at. I even set the stringmeter at the correct string gauge. Has anyone experienced this?