The MegaController snaps into this mount. The mount can be attached via screw mounting holes or with zip-ties to almost any printer. The mount is a very exact, tight fit that snaps around the edges of the PCB without interfering with any connectors. If you are not familiar with the Megacontroller Board, It is an extremely configurable print controller similar to Ramps 1.4 without the need for a seperate arduino microcontroller. (very competitive price!). It's based on the arduino Mega 2560 but with direct support for several extruder heating elements/motors, Min and Max endstops, several thermistor pins, several servos connections and even extra arduino pins you can configure yourself. It's available on Amazon and the manufacturer's website is makerlab.me Excellent support via web forum. Update 09/13/2014: Updated STL to remove non-watertight error.