I did not, my shaft had round rounds with a key way. The machine shop fabricated the ends when they made the new roller for me. If you have ordered the end piece from Flail Masters, there is no need to find center on the roller. The repair piece will have a step down machined on it to fit the inside diameter of the roller. Might need to clean up the inside diameter some for a snug fit. Just need to measure REAL good for where to cut so as to maintain the correct length. Basically the part is made so you could do the repair yourself.