I'm considering getting a new boil kettle and have pretty much settled on a Blichmann. I only brew 5 gallon batches but am considering some 10 gallon batches in the future. I was going to get the 10 gallon kettle but am now considering the 15 gallon kettle for the occasional 10 gallon batch. I know Blichmann recommends the 20 gallon kettle for 10 gallon batches but I know someone who does his 10 gallon batches in a 15 gallon kettle so I know it works. So my question is does anyone do 5 gallon batches in a 15 gallon kettle and, if so, how does it work for you? Thanks.