I'd like to improve my O2 exposure during dry hopping - right now I add the pellet through the conical's top port and then flush with C02. My beer results thus far are decent, but I'm always chasing perfection. I thought one simple step would be to add a port near the top, above the beer line, so I could run C02 into the headspace while dropping the pellets in. Anyone else try that, or think it might be a useful hack? Or is this about as useful as my current flushing process?