If you put lots of grease on the bottom cup, then you can stick the balls in the grease. It will hold them while you insert the fork as long as you don't dance around. Then do the top.
@cip1000 started
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If you put lots of grease on the bottom cup, then you can stick the balls in the grease. It will hold them while you insert the fork as long as you don't dance around. Then do the top.