Have fun getting that off. I twisted a hub once trying to get one off by just lacing the far end and using a half-laced wheel. I think there's a dialog on SheldonBrown.com about taking the freewheel apart clear down to the pawls and working at it that way. I know in the past year or so on the site here the issue was discussed as well. These days when I see something like that I don't even bother with it. Sometimes they come off easy, sometimes they don't