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snottyotter
Thanks for the reply. No matter what I do with the B screw though, it doesn't help. If I wind it out, I get less tension on the chain and the problem gets worse (won't shift down from any gear). If I wind it in, I get to the point of mashing the jockey wheels into the cassette on upshift before it will shift back down.
Might just support a local business by taking it to a shop and making it their problem, before I pull all my hair out.