Personally, I keep forgetting to swirl, and eventually it foams up when I do. I don't see why a stir plate is incompatible to the SNS method. Isn't it really more about pitching yeast while active?
I start a few hours before I brew and start it on the stir plate. When it's time to pitch, I pitch 1/2-3/4 of my starter and let the rest finish out. The extra hours into a jar or two until the next brew day.
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