Can anyone tell me what size drill bit or hole to drill into my fridge to accomodate a shank. The widest diameter I can measure is 3/4 inch and the people at the HBS are telling me 1 inch. I feel so stupid but isnt that gonna let air out?? Whats up with the "sleeves" I have heard people talk about? Just trying to not ruin fridge and get some beer kegged/cooled/and drinked!!! thanks