new AT-VM750xSH cartridge: set-up questions

I just installed a new AT-VM750xSH cartridge on my Pro-Ject Debut Carbon turntable.

I'd been previously been using a Sumiko Moonstone, and over the past several months, the sibilance in the inner groves has been extremely evident, so I figured it was time for an upgrade.

I took a chance on a shibata stylus from AT, knowing that it could be a nightmare to set up and it might be impossible to really align properly on my Pro-Ject. I only have a paper 2-point protractor, no VTA or azimuth adjustment.

Thing is, I've just finished setting it up, and... it sounds great? I am still kind of suspicious (i.e., paranoid) that it's not aligned properly, so:

I guess what I'm asking is would it be kind of obvious/easy-to-tell if something were crooked or not quite right? Is it worth fiddling with any further or should I just leave it alone since it seems to be tracking extremely well?