Hi guys n gals, I'm not new to this hobby having brewed a few beer kits n wine from kits and the Wow style. But I'm really keen to get started with kegging with a corny keg/kegerator set up. My problem is where do I get a co2 cylinder from? Can I buy one or do I have to rent? I guess what I'm asking is what do you guys do? Thanks for any advice...