Hi. while training my skills with new machine, I have found that when mounting a racket, I need to deform it with main supports by 3-4mm longitudal in order to get exactly same dimentions in the end. Otherwise, racket head comes out shorter by these same 3-4mm, no matter how much % I add to crosses to compensate. Wondering, why is it happening, I measured distance between metal main support parts, and found, that under full mains load, they are closer to each other by 4.5mm, i.e. deforming under load. Question to other practioners of stringing zen, what king of deformation, if any, you can measure on you machines?