GuitarBizarre
Listen to physics.
The SynchroniZR doesn't have the ZPS system in it.
It's called that because it uses the ball bearing design the ZR does, but if you look here, it doesn't have the second set of springs that touch the sustain block from behind - http://kkcdn-static.kaskus.co.id/images/2012/12/29/3538795_20121229024119.jpg
Those springs are the ZPS system so there's no patent issue with the SynchroniZR.
It's called that because it uses the ball bearing design the ZR does, but if you look here, it doesn't have the second set of springs that touch the sustain block from behind - http://kkcdn-static.kaskus.co.id/images/2012/12/29/3538795_20121229024119.jpg
Those springs are the ZPS system so there's no patent issue with the SynchroniZR.