I have an O2 system but rarely use it. I forcefully shoot my wort into my fermenter with a March pump and that aerates it enough. Beside, oxygen is for welding and breathing when a hangover is present.
Corona mill? You making bread?
You know, my Corona has always done me good, at least once I finally figured out how to keep it on a good setting.
How do you keep the "gap" just right on a Corona mill? I've used my Corona for a long time with good results, but every crush there are adjustment to make. phillamb168, how did you get the plates to stay in the same position?