I recently acquired four used ball lock corny kegs. I already have three kegs that I use in my three tap kegerator. I was wondering if I could age beer in my kegs. The one thing that stops me from making big abv. beers is that I don't want to tie up my fermenters for long periods of time. Could I transfer from my primary fermenter to a keg and age my beer for twelve months? Would I just purge the headspace with co2 and cellar it?