I received the Mint LP protractor and so far I have mixed feelings on it. The overhang arc aligns the cartridge much more in the middle of the headshell, whereas the Feichert overhang is setup with the cartridge all the way forward.
This produces an interesting effect with the Rega R100H - it made the highs slightly rolled off, it squashed the soundstage and separation, and lightened the bass. Most of the sound characteristics I love so much about the Zyx were toned down or just simply gone.
Could this be the problem I was experiencing with the Zyx on my VPI Scoutmaster? The sound is similar. I attributed the problems to the arm liking heavier cartridges, but now I'm starting to think it could have been the overhang being to far in. Using the VPI alignment gauge to set the overhang of the Zyx produced a sound that was squashed with the air and 'life' sucked out of the music. Maybe I should have tried a Feichert alignment on the VPI with the overhang set farther out?
I'm still just getting started with the Mint LP protractor. I'll need more time to make fine adjustments before I come to any conclusions. These are just my initial findings.