People will give me greif over this, but here goes. I have had several T&D rockers on the shafts do the same thing, but initially didn't notice until taking them off. They found their own clearence. Some of my buddies gave me crap for not catching it, had theirs clearenced by T&D and broke them eventually at the fulcrum. It's up to you, but if it makes you feel better you can take a little off with a dremel, but only a little. Maybe run it a little find how many and how bad the rub and sand them with a dremel tool sanding drum. Don't take any more off than you have to.