The Sunhokey Prusa i3 X axis has quite some play in it. This thing is an upgrade to the X axis base plate and uses four LM8UU bearings greatly increasing the stability.For Sunhokey acrylic Prusa i3. I printed this using a 0.4mm nozzle with a 0.2mm layer height and 50% infill with Slic3r. It has made an amazing difference to the output quality of my printed models. Use the existing hot end acrylic plate, nut, and screw. Simply press in 4 x LM8UU bearings and put on your X axis rods. The spacing is 45mm between rods.