Tonearm bearing slop (how much is normal?)

This topic is adapted from another one I had elsewhere about Dual ULM arms.

The query for audiogon is at the end.

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I bought a CS-508 on ebay, several mos ago, and it arrived with the top grub screw out of its bearing socket. (see 46 in schematic photo below)
Here is a Reddit post with similar issue

Photos from above Reddit thread:

Photo 1

Photo 2

It was simply to re-align the screw back into home position. No additional friction or other damage is either visually or audibly detectable.

However, I did notice that vertical axis has some play (slop). In the service manual of Dual’s with this type of arm, there is a procedure for adj. both the vertical and horizontal axis grub screws. I did reduce the play a bit by slightly screwing in 46.
Luckily, I have three other Duals of similar vintage to compare this 508 to. My CS-1257 and and CS-506 have some play (slop), but my CS-630Q has none.
Not sure what is "normal" play/slop for Dual ULMs, nor how important it is to overall tracking and performance.
I have several few test-sweep records, so maybe testing with those will help fine tune (or at least further investigate) this "issue."

If you have Dual with similar ULM arm (or any arm), check your vertical and horizontal bearing (grubscrew) play and let me know what you find.
Thanks!

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The CS-508 was well-packed from the ebay seller. The misalignment could have been pre-existing.

I don’t understand why my 1257 and 506 also have minor slop but the 630 (a model from the mid 1980s, not 1980-83 like my others) . Yes, the 630’s ulm design is subtly different, but not much.

I am curious about other Dual models as well (mid to late 70s).

If anyone has these models nearby, please give that arm a toggle and see if you have slop. Thanks!

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BTW: feedback about any turntable and any tonearm, including uni-pivot, would be helpful.