I've got a similar setup in one of my bays using full extension slides from Lowes. Have a 6 drawer Kobalt tool box mounted to the slides which are bolted to the compartment floor using angle and fender washers. Slides are mounted to the angle and the box using pop rivets. Don't know the exact weight of the box but its loaded and has Ben riding fine for 2 years. I'll try to get some pics for you tomorrow.