I am looking at upgrading to a 30 gallon Blichmann as boil kettle and also making the conversion to natural gas on the top tier. Has anyone else brewed with this size kettle using natural gas? I have all the pieces to make the switch to NG, and am looking at doing 15 gallon batches max, just started wondering if anyone has had experience with system like this. Trying to decide on getting another 20 gallon kettle or upgrade to 30 for the option of larger batches. Thank for any help.