I have that too and finally upgraded to the Captain's choice heavyweight copper bowl. a bit pricier, but it doesn't topple.I was going to ask the same thing! @Chard52142 you're the master at the Foster's Freeze effect! I love the tutorial pix too!
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Btw I think I have the same Turkish copper bowl that you show in the photos. You ever have issues with it toppling over with longer or heavier brushes when you rest them back in it between passes?