• I'm getting a very slight chain rub on the front mech when I'm the lowest gear.

    Have you utilized the tension screw? (that presses against the seat tube)
    I'd back off the screw, angle the FD inboard a little and then use the tension screw to push the cage to a little less than parallel with the chainrings.

  • I couldn't work out what that screw did!
    Shimano tech docs weren't that clear.

    I did give it a turn but didn't seem to change anything so I turned it back to avoid messing everything up.

    I might explore it a bit more when I'm back next week.

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