ProjectBuild a Keg Lid Carbonator: ProjectsKeg it and carbonate it quick with this handy device you can make. Already a member? Log InWritten by Thom Cannellphoto placeholderKeg it and carbonate it quick with this handy device you can make. Already a member? Log InYou'll Also Like Project MEMBERS ONLY Build Your Own Glycol Fermenter Build a glycol chilling system to keep your fermenter at the optimum temperature. Project MEMBERS ONLY Portable RO System: Water on the go Reverse osmosis (RO) systems have become fairly common in the homebrew world. While most systems are meant to be stationary, one homebrewer wanted to make his portable. Check out his mobile RO system build.