VTA issues beyond those which might be shimmed??
Does anyone have experience with this cartridge, either with our gear or others?

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IMPORTANT EDIT:
Amazingly, I now find strong indications the vendor sold me a used cartridge without stating it was such when they sold it to me. I am trying to sort all that out, but would still much appreciate any impressions or technical notes concerning the Sigma (particularly in Rega arms).

