pump and test to see if it's the right way around. 3. Strip down the heatsinks, we don't need the fans or fixings. We'll use the larger one as the base and for more stability thermal tape is available from most overclockers. 4. The plan is to create a box around the cooler; we're going for 120mm square big enough for bottle of beer. Take the A3 foam board and use a sharp Stanley knife to score and cut through. 5. For a stronger construction we're going use dovetail joints, use an off-cut piece to practice. Mark a 5mm strip, cut two opposing 45 slits into this, remove the strips either side to leave the joint. 6. You'll want three perhaps four joints on each side. Use the off-cut piece as a template to mark and cut three sides. For the front use an off-cut from the door to connect the bottom area. 7. Measure a 120mm square and a 110mm square area of foam board and glue these together, this is going to be the lid. Glue all the sides and the top in place. We used elastic bands and some books to press things together. 8. Double check the measurements inside and cut a slab of polystyrene to fit. Cut a hole that fits the upper heat sink. 9. Construct a front door, we added a window by cutting a smaller version that can fit inside the front. We kept things easy with card hinges and Velcro. Sign