I recently sold a big block harmonic damper to a guy and was told it was no good as it had a hole drilled in the outer ring (similar to the attached image). My beleif was / is this was done at the factory and with as many examples as I have seen I never suspected it to be problematic. Am I wrong? I certainly don't want to dissapoint a buyer and you learn something new everyday so here I am asking. Appreciate your guys help!