I dunno is there anything I can paint the shaft with to see where things are hanging up. When I bought the dl I couldn't get it on the shaft at all. After an hour with a file it went on with some encouragement. So I called Tom and he urged me to pull it back apart. So I did and filed some more, slammed a bunch of wheel bearing grease on it and everything seemed fine. Until I blew my motor and went to check it last night and if was stuck again. I don't think it's a twisted shaft only because, when I did tug on it and finally got it loose it slid almost all the way off and got stuck again. I'm going to have to use a pry bar or something for this one cause it ain't moving. Sorry for the long read.