I have used the pro version of that protractor for quite a few years now. The Uni Din can be really good. I like it on my FR64S, but in truth I haven't developed a metric for when to use it or not. Try it on for size :)
What about Uni Din?
I finally broke down and purchased a Smart Tractor. The owner of that company created another cartridge alignment he calls Uni Din. He makes a very reasonable argument for favoring the inside third of records particularly those cut down close to the label. This is at the expense of the outer grooves. But the outer grooves are traveling three times faster thus a given tracking error has 1/3rd the significance in terms of distortion.
Has anyone here tried this alignment? If so how did you like it? I will certainly give it a spin as reorienting the cartridge in a Schroder arm is as easy as it gets.
Has anyone here tried this alignment? If so how did you like it? I will certainly give it a spin as reorienting the cartridge in a Schroder arm is as easy as it gets.