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Here are a couple of pictures of what I have come up with for the upgrade from the early (90 to 91) version of this system to the later, 91 and later version. It involves drilling a hole up the end of the shaft and tapping it for a screw to hold the stop/washer on and then three different plastic washers to go onto the shaft and the eccentric, one on either side of the bearing and one just nest to the stop, assuming there is enough space on the shaft for all of it. That will have to wait until I get the thickness of the eye on the through bolt.