Haven't drilled any vent holes - when I next use them, I'll see how hot they get. Thanks for the safety tip.Very nice.
Did you cut the bottom of the mason jars or drill any vent holes in the lid? Do they get very hot?
One added touch you could do would be to connect a length of black pipe to the bottom to act as a conduit for the cord. Would only need to be long enough to get behind the keezer. Cords make me twinge repeatedly.
Sweet tap handles too!