I finally got tired of having all my tools scattered all over my garage and decided to build 4 cabinets to hold it all (well, almost all). They are on casters so I can roll them around when needed, but you must roll them out to open them up.
Cabinets open. Hard to tell on these photos but cabinet opens to reveal 3 storage areas. Each outside door is pegboard on top and shelves at the bottom. Center unit is walled up half way with places to hang on each side and above center divider is shelving.
Close-up of one side and the center unit. all three are hinged with piano hinge on back and caster on the base for moving around.
This is a close-up of rabbeted edge. Notice how the plywood side sets inside the slot cut from the 3/4" plywood. Both side and plywood edges are flush. If you choose not to do this the plywood side will attach over edges of plywood
This is a side and back view of 3-section cabinet. Piano hinges attach the sections. I use sides for hanging T-square and cutting guides, and hinged shelf holds sandpaper when folded up and latched.