I strung for many years on an AG drop weight machine. Not long after I bought it, I borrowed somebody's callibrator and was shocked at how off this machine was. In other words, if I set the weight at 62 I'd get something more like 55 according to the callibrator. I found a pretty reliable remedy which involved using both the tennis and badmitten weights, blah, blah. ANYWAY, I just bought a new machine--an upgrade: Gamma Progression II 602FC. I'm putting the thing together and wondering if I'm going to have the same situation: set the weight at my beloved 62 pounds but get something more like 55 pounds. Anybody's thoughts on this???