K3 is the most successful one? not MX-P or Yasaka 7/9? I always thought it would be one of these ...
China Guang was 55 and was amazing to play with ... while it lasted. and it lasted about a month, had it for about 2 weeks on FH, then realised it amazing for BH, too and had it on BH for two weeks until it died (grip wise), so I boosted it, to see if I can get more life out of it ... but no ... it became an uncontrollable rocketship. China Yang was 60, but wasn't available in EU ... but yes, I do agree - I do not get it why a professional player would not use China Guang - it's ideal rubber for sponsored players, but then again - Jekyll & Hyde, which is even better rubber.