So shift the mech in towards the wheel if you need increased space between the cog and jockey wheel?
Yes, but that messes with the chainline.
True. I guess you'd only be able to go so far inwards before that became an issue.
3/32" 8/9sp chains work fine so it's not essential the chainline is perfect.
@Emyr started
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So shift the mech in towards the wheel if you need increased space between the cog and jockey wheel?