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psg1ben
Also he has some mega range cassette on the rear and it wasn't shifting into the lowest gear. I think the issue is the B screw which was bent and with bits gouged out of the thread.
I replaced it with a spare one I had but as I screw it in it doesn't align properly with the screw stop on the frame so I can only push the derailleur a certain distance down and this isn't enough to accommodate the bottom gear.
Is there a way of sorting this? The end stop is very small so doesn't seem enough to bend into place.
If I find a small bolt that fits onto the screw thread would that work? I. E. I'm thinking it would make the end of the screw wider and would then remain in contact with the screw stop.