Needing some help with a problem I'm having whilst working on a friends bike.
I can't get the rear derailleur, Shimano Sora, to fit properly. There seems to be a notch where the derailleur mounts that is there so it sits flush with the drop-out but I can't get it to fit properly. The limit screw, which is fully undone, is in the way.
What am I doing wrong?