Microscope for stylus inspection


What power of magnification is adequate to determine stylus wear?
I purchased a 30X hand-held scope and checked my stylus.
It looks "as-new" i.e., like a perfect cone (Sumiko Blue Point Special).
There are no obvious flats on the sides and all seems to be fine.
I could see where the technician polished the sides and left the 0 and 180 degrees points a little "rough" as they never touch the vinyl.
Does this sound O. K. or do I need a more powerful scope?
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