Update: I have a poolish doing its thing, per your instructions, uk1. It's been about 6 hours and it has a pleasantly yeasty aroma. I'm going to use it in bread tomorrow. Do I need to feed it any? I'm leaning to no, since you haven't mentioned it, but I don't want the yeast to starve/eat all the gluten. Maybe I'll give it a small feeding for overnight.