Everyone of us has a racket which we love so much. My current love is the MX 80 3U. I have the luck to own two which have the same weight and nearly the same balance. Now I ordered two more MX 80 because it's my go to racket for tournaments. The dilemma: The first of the new MX 80s is 2g lighter than my current two but has the same balance point The second new one is same weight but the balance point is closer to the butt cap. Nearly 7 mm. So I'm thinking of ship them back to the mailorder to get two others which can be more close. I can compare them because I stated the weight of my currents in use as they were new, unstrung and with plastic on the grips. Now my questions: 1.What are your experiences of getting identical rackets. Must we live with these tolerances? 2.How does these tolerance effect your game during tournaments? 3. What's your opinion, does 2 g or 7 mm are noticeable? 4. How do you buy rackets to get 2 or more identical rackets for your bag as back ups? 5. State your current tolerances and your impressions! In our century, with all these technologies, measuring instruments and good quality managements why it's so hard to produce identical rackets?