The ZR trem was designed to solve the problems of Floyde Rose in play-ability and set-up . So ZR has a lot of advantages.
1. Ball bearings pivot
ZR has ball bearings pivot to provide great tuning stability and smooth actiion. The nife edge has a limitation in tuning stability because of the structure and production. The instability of heat treatment cause dispersion of quality.
And the great point of ZR is tuning stability without zero stop bar.When the bridge is floating, it also performances greatly like with zero stop bar.
2.Zero Point System(ZPS)
The floating bridge has always two problems. If a string break down,we can not continue playing . And tuning of floating bridge is very very difficult! If the ZPS is set correctly, the tuning is very easy because ZPS makes zero point. And by the differential of force between main-springs and sub-springs, it keeps the balance when a stirng break down.(Of course in the case when the setting is correct )
And for the zero point ,the bridge is stabilized far better than a floating bridge in any case, and it makes long sustain.
The differences between ZPS and other back-stop mechanisms are "ZPS has no cylinder-structure,so ZPS is much smoother than others" and "we can select non-floating or floating easily".
ZR can be adjusted the location of intonation with built-in screw.So the saddle lock screws are offseted against strings.
I recomend you should adjust in state with zero stop bar because without zero stop bar ,the location of bridge is instable.
4.Tremolo bar socket
ZR's tremolo bar socket designed to adjust the torque and bar-heigt.And another good point is the less-play of the bar when it is set.
5.Spring tension adjustment
Spring tension can be adjusted at one place, so you can easily adjust it.
Particularly in floating state, it will be much advantage.
6. Material of saddles
The material of saddles is storngly heat treatmented iron. So it makes bright sounds and long sustain.
7. The distance between saddle point and locking point
ZR's saddle is designed to minimize the distance between saddle point and locking point because to provide good tuning stability. So the lock-pad has special shape.