So I have a keg of carbonated beer to bring to a Super Bowl party at a friend's house on 2-2-14. Knowing that the trip there will likely stir up my nice bright lager, I'd like to transfer to a new keg to assure bright beer for serving. Since I have time, I thought I would transfer out post to out post (with the pressure relief valve open on the receiving keg), but the last tine I did it with carbonated beer, it foamed like crazy through the open pressure relief valve. Should I go with it now, lose whatever foam occurs and simply re carb in the new keg to replace the CO2 lost in the transfer, or is there a better way to suggest?