I just picked up a new 4.5 MMM and noticed there was about 2mm of play in the rotor/shaft. Is this normal? I don't have that amount of play on my V3.0 6.5.

I have some motor shims if I need to shim it but I'm not entirely sure how to "center" the rotor because the magnets don't seem to be pushing it to any natural static position.

Thanks in advance for any tips.