Been lurking here for a little while and thanks to a mechanical mishap on a club ride last night, thought I'd head online for some help (hopefully). So last night, I managed to break off the little hangar thing from the underside of my chainstay which holds the rear gear cable in place, effectively rendering my bike a two speed for the rest of the journey. It looks like it might need to be riveted back in place, any tips or just head straight to my LBS?