Finally have enough disposable income to justify the desire to do my first watercooled rig. Been researching, reading, verifying info, and then going back around again to make sure I don't waste my money on useless junk. One question that keeps rattling around is in reference to tube reservoir orientation. We'll use this attached picture for easy illustration. Does it matter which end is up once installed? Is the side with two ports supposed to be on the bottom? the top?