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I bought a kit this weekend, But i was wondering it i could have rigged up something myself...
plus i wanted to start off with a small batch maybe 2 - 2 1/2 gal.
Not really. It needs to be bigger than 5 gallons to allow for a krausen (head that forms). Most brewer kits have 6.5 gallon pails that they lable up to 5 gallons.