Digital Microscope advice SRA

I have never tried using a digital scope myself.  I read comments by a couple of manufacturers of cartridges that there are problems with this approach.  For one thing, when the record is actually being played, the angle changes so the static measurement will be different from the supposedly correct angle during play.  

It makes more sense to start with a rough setting (the easier to accomplish setting of the tonearm/cartridge top parallel to the record surface, and then make small changes based on sonic preference.

Thanx folkfreak 1, I already have the smart stylus jig. Nice rig BTW.lewm, Did you ever hear the song "88 lines about 44 women" by the nails?Just whenever someone uses the word nihilist I think of that song.I'm actually not an Nth degree er. But I just thought since I have the equipment I'd give it a try. I was surprised as to how little my styli has worn. Nice to see that the stylus cleaner does the job it supposed to do. And I know, I know before I get frustrated,,, "Drop the screwdriver and back away from the Turntable!"

Judge it by ear. You will never be able to see anything like what you can hear. Classic case of misapplied technology.

I agree with @lewm Even those who tout the microscope method agree it "might" get you into the ball park, but final setting is always by ear.

My own $.02:
Find a recording that people say is good for hearing the differences when you adjust SRA. Do a search here and elsewhere; there are a lot of suggestions out there. If you can't find one, take a record of a female singer and listen to it over and over 'till you know it very well. I have used Joni Mitchell's "Blue." Make sure it's something you like 'cause you'll be listening to it a lot.
Set your tone arm to absolutely level and listen to the recording a few times.
Read all you can about your cartridge and see if reviewers or users have a consensus suggesting tail up or down.
Change the angle in that direction a very small amount and listen to the whole record. You are listening for the voice and instruments to "pop' making them more 3 dimensional. Do that again and again in very small increments. If you do not hear improvement soon go back and stay at level.
If your reading does not come up with a tail up or down consensus. You may have to do this in both directions.
Ditch the microscope. IMO it is of little use with any cartridge, but especially for those with a sophisticated and non-symmetric shape

OP, this is one of the stupidest things to do. Just get the top of the cartridge parallel to the platterand call it a day.