Hi all , I'm building a new 4 bank of 4x2x2 , for each enclosure I have 1 larger type rectangle vent and 2 small round vents I'm after suggestions of which vents you would put on which end and high or low also should I put them on the end walls or rear wall somewhere for the larger vent and the smaller round vents on the front???. Any advice and suggestions would be appreciated . Cheers BigBrad