Hi Bruce, You may be right, but if the plastic end caps are worn, you can bet your life the shaft is worn where the end cap wears away at it. I had a guy weld over the worn area and then turned to the correct diameter.
Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member. Kindest Regards, Darryl