Re: ZR Trem good?
My friend used to have an S with the ZR trem, so I can give you a review of the trem interms of functionality. However, I can't really tell you about the strip down and dissassembly n all that.
Anyway, I think in terms of stablity, the ZR is unmatched. In comparison with the Lo-Pro in my FP, it stays in tune much better. I mean, my Lo-Pro doesn't go out of tune unless I really abuse it but the ZR just wouldn't move a single bit. The built in trem setter device really makes a different in the stablity. Also, double stops don't go out of tune, which is great cause I've been a bit vex about double stops on the Lo-Pro (as with any other non-trem-setted floyd rose). Intonation was also much easier than the Lo-Pro. The intonation screw is off-setted so its not directly under the string. The adjustment machinism is easy to work with, I would say easier than the Lo-Pro. Some not-so-good things about it is that the trem feels significantly heavier than the Lo-Pro, some do not mind, some do, depends. Another thing is that flutters are much more dampened than Lo-Pro. It's still there, but hard to get out. Rich from ibanezrules.com actually speaks quite highly of the ZR bridge but doesn't go into too much detail. Hope my information helped.