[A section on mains electrical safety measures needs to be added here. It is //seriously// not cool to leave the mains terminals exposed. Strain relief should also be added on the mains cable (which can perhaps be as simply as using a cable tie through the power supply grill). Last but not least, consider bridging neutral and ground to increase safety in areas where the neutral line is not grounded (such as you can see here: http://reprap.org/wiki/RepRapPro_Mendel_power_supply ) - otherwise you have a floating supply. I think the Power Supply could warrant its own section on the page.]