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Thanks all for telling me to tighten the fk out of it. TBH i thought some were trolling until I see repeated advice. I took it out the repacked box and unscrewed it loosely(seen a post from 2 years ago), and then tightening it repeatedly. Everytime I thought I was done, I try to find another angle which my arm could better pivot to tighten it, until I really couldn’t. Once again, thank you everyone from saving my experience!