I think I liked Ryland's idea the most from the GS thread:
Quote:
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fill one groove with jb weld, and file a spline off so you have a fool proof index, then with the jb weld out epoxy on a few rare earth magents on to the bace of the shaft, and the back side of the amr to hold it all together, then it's just a matter of sliping the arm over the shaft and it snaps in to place.
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Indexing, and magnets!