Hello I would have the frame alignment checked, to ensure your frame is still straight and your rear triangle is not just offset to the left.
also I think you just solved a problem for me. a coworker bought a bike off ebay but it came broken. he told me it was shimano but I can't find a shimano 7 IGH that has a rod mechanism to shift it. Thanks for the tip
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk