Rails for Reclaimed Refrigerator Drawer

Old refrigerator drawer was getting thrown out at work (I don't know the backstory), so I cleaned it up and designed a rail system for mounting it under my 3D printer workbench to hold my 3D printing tools. If you look in the pictures, the bench has a 3/4" plywood sheet on top of a 2x4 frame; the frames screw into the bottom of the plywood and the side of one of the 2x4s of the frame. Yes, this is a very niche design.

I color coded the design for you guys if you want to put it together. Her