I am upgrading my old Prusa i2 with a RepRapDiscount Full Graphic Smart Controller. I designed this simple mount / holder for it. It is in the same style as the Mount for Geeetech GT2560 and Prusa Mendel i2 modified x-axis endstop holder. The holder is mounted such that pressing the rotary encoder does not bend the controller around the threaded rod of the frame. The mount / holder is designed to fit around a 8 mm threaded rod. Use the OpenSCAD-file to modify it to your needs. Use M3 nuts and bolts. Place the four spacers between the circuit boards. Two of the mounting bars have room for the connectors. One for mounting the display on the left side and one for mounting the display on the right side. I use the Geeektech GT2560 Rev A controller board. When I connected the display (EXP1 to LCD, EXP2 to SD Card) the only result was a clicking sound. I had to force the connectors the wrong way around to make it work. I do not mean swapping the connectors but putting the connector the wrong way around in, using some force.