When trying to get a stuck faceplate off the spindle, I put the faceplate wrench on and gave it a sharp whack. Unfortunately, the locking pin apparently was not seated all the way in one of the holes in the pulley/indexing plate. The indexing plate now has about six positions (next to one another) whereby the pin will not seat correctly in the holes. I believe the only remedy is to replace the pulley/indexing plate. Has anyone done this? Can you give me an idea of what's involved to do the replacement. Thanks.