Quote Originally Posted by DrNomis_44 View Post
Cheers mate, I used to own an Ibanez S420WK (Weathered Black) Superstrat Guitar, it featured Ibanez's then-new ZR Trem system ( basically a re-designed Double-Locking Floyd system) which used a ball-bearing system instead of knife-edges for the bridge pivots, Ibanez said that the new system included features designed to improve tuning-stability, well try as I might, I could never get the S420WK's trem to reliably come back perfectly in tune, if I did a dive bomb, the strings would come back flat, if I did a pull-up the strings came back sharp, I tried disabling the ZR system and the result was only marginally better, this was with a ball-bearing pivot system that should have eliminated any of the issues with knife-edge pivot systems.
My mate Max (see above) has a whole range of Ibanez S types of different ages (he moved to them from Jems and RGs because of a worsening bad back and their reduced weight), so has a mixture of Edge, Edge Pro, LoPro and ZR trems. He prefers playing the Edge style ones over the ZR, but the one he plays the most does have a ZR on it and it stays in tune for him. I'll ask him if there are any special tips on setting it up.