Rechecking Cartridge Alignment

Let's all keep in mind that alignment is futile unless the zenith angle (the relationship between the stylus and the cantilever, viewed from above) is such that the stylus is perfectly square to the long axis of the cantilever.  If not, you are deluding yourself if you think you've got it exactly right.  Once I was made aware of this source of error, I started examining my cartridges under a microscope.  Very few are perfectly squared or even look to be squared.  Namiki and Ogura (and whoever is the 3rd source in the world) tolerate an error of +/-5 degrees in cantilever/styli they sell to cartridge makers or re-tippers. I can only hope that the big time makers of expensive MCs are hand selecting assemblies that are perfect or nearly so.

Define "professionally".  Do you have a decent protractor, stylus force gauge, and etc, that you once used to align this cartridge?  If so, just do it again. Your work is bound to be as meticulous as anyone else's in your immediate vicinity, because you probably care more about it.  If you want to spend $500 to have your cartridge fully evaluated by Wally Tools, that's another matter.