Roadworx Monitor Speaker Stand Clamp

I have Kali IN-6 on them, the left speaker on the stand has maybe 1 degree sideways tilt which I can't correct, but it's not that visible. The right speaker on the stand however has a couple of more degrees of an angle and if I flip the top of the stand, then it's even worse.
It would be nice if it was possible to tilt it a bit sideways, but I don't see an option how except maybe with a shim between top board and post, so to say, but that's too much work for small angle.
So aesthetically it's 4/5, overall it's great. I've had wall mounted ones before, but now with standing desk this is much better.