Circling back to report my experiences with setting up my new cartridge. I did order the Mint LP protractor and a USB microscope, per nrenter's suggestion. But perhaps the key ingredient was the assistance of my wife, who held the microscope at just the right angles for me to view the stylus from different angles to ensure it was sitting dead on the correct points. Of course, there was some trial and error with the tiny incremental adjustments of the cartridge in the headshell, but it took less than two hours to get it pretty well perfect according to the settings on the Mint LP, and it sounds great!
Thanks for the input of everyone who participated. The combination of the Mint LP protractor, the USB microscope, and my spouse's steady and patient hand turned out to be a winner.