Cartridge protractor- the best?


Hello. Would like some feedback on the best cartridge protractor for Rega P9 with RB1000 arm. Why do you recommend your choice? Thanks in advance!
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Thanks Inna, but surely you don't mount your cartridge by "eye-balling" it? I agree, final tweeks can be done by ear, but I would like to be in the ballpark to start with. I purchased the Rega because I do not really want to fiddle with setup, would rather play some records! Anyone else with a recommendation?
Pick youself up a Mobile Fidelity Geo Disk ( around $50 ) ...Very simple to use and will get you close enough to play and enjoy..You can tinker more using your ears for final adjustments......
Download an arc protractor from Conrad Hoffman's site. It's free. You simply enter the correct parameters for your table/arm combo and it does the calculation. I have virtually no inner groove distortion now that my cart is aligned using an arc protractor.
Anything that doesn't have a nail point that rests on the pivot point is useless as far as precise alignment is concerned. Buy the Feickert . The Geo disc is a joke for precise alignment.
If you have more than one turntable, several arms or change cartridges often a multi-purpose tool like the Clearaudio or the Feikert is a godsend.

For simple alignment tasks or a single turntable, arm & cartridge combination, a simpler tool will get the job done. Some like the Turntable Basics mirrored protractor, and some will prefer Yip's Mintlp tractor. I have owned both and prefer the db Systems DBP-10 protractor. For simple alignment tasks, it is probably as much as you will ever need. Although I own and use a Feikert, I always keep the db Protractor around and I do use it on a regular basis.