I have a post on the top and mounted the roller with no trouble. When I put the Warrior back together I had some chain drag at the spot where I believe the lower roller goes - but there was no post - just a welded tab with a hole in it. It looks like my post may be missing and the tab holding it is bent. I've pulled the bent tab out of the way and have had no issues with it. It still would help to see what it is supposed to look like.