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!
varyat
Are you familiar with exhaust sound of Ferrari? Can't confuse it with the others. I heard that they invite someone to tune it by ear. In any case, it sounds better than stereo.
Mounting cartridge by eye-balling it? That could be fun but I am afraid it would take more than a day or two.
I use DB as well and then fine-tune.
More thumbs for Yip's arc protractor. Ie for the individual
combo TT-tonearm because the (different) dimensions of the spindle are accounted for.

Regards,
Couldnt agree more with yip's mintlp. Highly accurate . Need bright light & suggest to set up with a 10 x 20 monocular