WallyZenith

Did you know the jewel making vendors who sell stylus/cantilever assemblies to cartridge manufacturers allow for +/-5 degrees of zenith error? This industry tolerance hasn't stopped us from seeing MANY cartridges with much more zenith error than this. The WallyZenith allows you to correct for the zenith error found in more than 82% of all fine-line contact styli.
Zenith error is probably the most audible angular parameter on a degree for degree basis.