Light weight. The LWLF2’s rail weighs 2 grams per 100 millimeters of length, and the slide unit weighs 0.21 grams. IKO’s LWL family of miniature linear motion rolling guides is appropriate for ...

completely forgoing linear rails in favor of strings. The closest thing to a linear guide found on the Marionette is a pane of glass against which the top surface of the print head slides.

I've seen some other conversions using linear motion rods outside the frame but I prefer linear rails and within the frame, even though those mods re-use more parts of the original Ender. Some of the ...