Corona Mill hands down. I was using a pasta machine to mill and it would take about 40min with a drill to get through 10lb of grain. Used the corona for the first time this weekend and did a 10lb bill by hand in 10min.
Yeah I had only 1 oz of centennial so the rest are cascade. I'm sure it'll be close. I hear about people harvesting yeast from bottles. Not sure how that works but I'd like to do it some time.