Hi. I tried to remove my front sprocket nut with a 27mm socket (and breaker bar) but made the mistake of using a 12 point socket with the result that the edges rounded off. Now I'm hoping that obtaining a 6 point socket and trying ,it should still grip. There is a 32 mm section at the base of the nut but it seems too shallow to get a socket on. Please could you give me some advice. Is the 27mm socket correct? I've heard that a 1 1/16 " fits better. Thanks.