believe it or not i used a cheap aluminium square cake pan. called a lamington pan in aust. approx 2"1/2 tall and fits my gigabyte ga-5ssm mobo no prob.. has a 10 mm lip all the way around to screw a flat sheet of ali to !! room for mobo, 3"1/2 hdd no prob... even room for dc-dc c0nverter.