hellokitty thanks for your thoughts. Here's an update - I contacted Ground Control, sent them the video clip showing the noise and they are sending me new bearings under warranty. Since Millway isn't available till Aug 25th anyway, I think I will give GC one more shot with the new bearings - will take everything apart and clean and grease and re-install with new bearings and see how long that lasts.
Will post an update.
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