About this 3D model

Here are the LibreCAD (.dxf) files I used to laser cut a flat surface out of 2mm aluminium/steel. It has mounting holes for the PCB heatbed mk2 (http://reprap.org/wiki/PCB_Heatbed) using M3 screws. Due to it's superior thermal properties to glass, it heats up faster and to large temperatures then glass, in addition to being perfectly undistorted. It is important to cover it with kapton tape (painter's tape might work, but personally i haven't tried it), as ABS and PLA WILL NOT stick to bare aluminium.