Takes 5-mins to install, greatly improves X Axis stability of the original Printrbot LC+, doesn't require any drilling, disassembly, or recalibration, and you only need one.Printed using 3mm ABS @230F Bed @90F Final slic3r settings: 15% Infill, honeycomb, default speeds, 1 perimeter with Advanced / Extrusion Width / Perimeters set to 1.5mm. Print time: 20mins using 1488mm of filament Remove flashing inside guides after printing using X-Acto knife or similar to insure they glide smoothly over rods w/o binding. Affix to right side of head using 1.5"-2" screw, washers on each side, & nut on left side. Tighten completely (stabilizer will bow a bit). NOTE: You only need one of these (two defeats the way it works).