did u get it done in the end, i remember changing mine and it took ages becuase i couldnt get the old one off, had the main bolt off but the wheel was so stuck on, i almost broke it trying to pull it off, just had to keep wiggling it left and right to loosen it. Plus i left mine for about an hour with the battery disconnected just in case, quite an easy job apart from the above part, but maybe that was just mine.