Two things are keeping me from giving this 5 stars:
1. The trem's center spring catches the clip springs of the Sure Claw, so I had to remove the clips, no big deal. They are not required. However, Schaller could have just spaced the worm gears wider.
2. Unlike the Ibanez ZPS system, it is not toolless to adjust. I would like to keep the hex drive, and add a thumb wheel.
Overall, I still recommend the product. It is more convenient than a standard claw.