Now, and you might want to have the stylus inspected properly via stylus microscope. Nearby dealer? They want to sell you something? Hard to trust. I send my AT MC to AT, trust them to give me trustworthy response. I tried one of the toy usb microscopes, a waste of time IMO.
Meanwhile, I re-check tracking force and anti-skate often, perhaps monthly, and before any pre-planned listening session with friends. Miniscule particles on the bearings might/can alter fine adjustments. Miniscule changes to level (rubber compression, ??? very slight changes can occur that effect anti-skate to a minor degree, but worth checking.
Alignment: I have an LP with all the lines to easily double check null points, correct means you got the screws tight enough, thus overhang would have remained correct.
Azimuth: fixed cartridges, they always reflect straight, but reassurance is a good thing
Azimuth: removable headshell, I check every time I remove/replace/change the headshell. Mirror technique, pretty easy to see any error in the reflection in the mirror..
VTA is the trickiest, especially if you change to headshell with a different cartridge height. My removable headshell arm allows easy/instant VTA adjustment, I don’t go for perfection by listening, simply arm parallel while playing, sounds great, done.
Avoiding ’wrong’ more important to me than audible perfection. The cartridge’s specified VTA, i.e. shure 15 degrees, Ortofon 20 degrees are for when the cartridge is down in the groove with tracking force applied. I have a transparent protractor with degree lines scratched longer to see ’better’, but I find parallel arm is always close to my best protractor ’guess it’s right’.
I believe any/every one who is involved with LP should acquire the inexpensive tools and skills to mount/align cartridges themselves.