What are your techniques for Lagering with a keg? Currently I have a pilsner that went primary for 2 weeks at 52 and then secondary for a week at 46. I want to brew another batch, but only have one fermentation fridge. I have a one tap kegerator with a temp set down to 34 that i could use to lager my pilsner. Is this a good idea? Do I purge to Oxygen and lager in the keg with co2 in the top?