This bearing holder allows the standard single-sheet Prusa i3 to use lm10uu bearings for the Y-axis. The bearings I had did not fit securely in the slots with zip ties. As always, I have included the .scad files, so any modifications can be made. I love it when people remix my designs, so please make it better!1) Print 3 copies, I recommend support material. 2) Insert lm10uu bearing into the sleeve 3) Use 2 M3 bolts (I used 20mm length) and 2 M3 nuts to attach each bearing holder to the aluminum bed through the zip-tie holes.