Phono Protractor. Recommendations?


After purchasing a new Cartridge recently, I'd like to purchase a good protractor.  There are so many available, each claiming to be the one to have, I'm confused.  
What do you recommend?
louisl
louisl,
Your spec is most likely 258 mm. Remove the arm and measure pivot spike to spindle center for the actual.
I have all 3, Mint, Dr. Feickert, and SMartractor. They are all good. I like Smartractor the best. If you plan to change cartridge more often, I recommend the Smartractor. 
Send an email to Mike Fremmer.  He knows this stuff better than anyone I know.