I am going to brew Edworts haus pale ale but instead of using cascade I want to use some centennials I have. I am a little concerned about the age because they are from a 2006 crop and the silver vacuum packed bag isn't fully vacuumed any more, there appears to be a small amount of air in it. My question to the more experienced brewer is how would you handle adjusting for possible loss of flavor, aroma and Alpha Acids?