Most workbenches feature a base that leaves a lot of open and unused space under the bench. My Split-Top Roubo has a shelf on the bottom that pretty much only serves as a place to collect junk. A much better solution is a custom-designed cabinet that gives me a place to store tools without getting in the way of bench's functional parts. While this unit is designed to fit the Split-Top Roubo, it isn't difficult to resize for any other workbench. This project is for the cabinet only.
