DMCP

I sent my 2004 millie off for a spa treatment. After setting everything up again I’m having trouble with the power advance. I can not seem to get it right after hours of trying. The whole motor assembly moves slightly and make a bumping sound with every rotation. ( both forward and back rotation) I have pages (#87) of the manual and have followed it the best I can. I can not get a good fit…there is a gap which I am struggling to close. Has anyone had this problem…and solved it. Do you have any hints to help me? I can only provide photos at this time…my videos are to large. Dmcp48@yahoo.com (Deb) Appreciate any help offered.