Anyone know of any rack chasis that are only 16" deep preferably 3u that can use ATX boards, with full pci cards and power supplies? trying to setup a computer in a pro audio road rack, for a mobile recording setup with a Presonus Firepod, so if i can find a 3u I can put the 3u and the 1u firepod in a 4u road rack and pop it on top of my bass gear's rack. will go 4 if thats all there is and just buy a 6u case.