I've got a homebrew competition on 14 May but wanted to tap into the five-gallon keg of my Big, Black, and Burley Stout this Friday with some friends. The carbonation is rougly 15-psi after a couple weeks on my corn sugar mixture and I can always add CO2 to keep the beer at 12-psi and it will never come into contact with oxygen. But seeing that I would like some validation, does anone know why I should not crack into the beer Friday seeing that I will be putting it into a competion on May 14th and will never be touched by oxygen? I figure the biggest threat to this beer is me drinking it before the event, huh?