I dunno about other brands but I have Victor krps straight out of the national teams old stock, and let me tell you these rackets aren't all that magical as people believe. I expected my Tk9000 3u krp to be a hammer, but it's not even necessarily the heaviest or most powerful racket in my bag, it's actually very well balanced, Jack of all trades type of racket, and this was the racket used by Shin baek Cheol at WC. The pro rackets do however have an extremely tight QC with exactly the same weight and bp for every copy. I have never seen a 4u krp, but I did notice that 3u krps came in at exactly 2 weight classes, either 89g dry, or 85g dry. I don't know why they don't just make a 4u krp but the 85g 3u essentially plays more like an 84g 4u than an 89g 3u, so keep that in mind when pros all say they use a 3u. The 3u copies they get might actually be 85g.
