UniTak3D Ender 3 Dual Z-axis Linear Rail Bracket MGN12H MGN12C Linear Guide Carriage Conversion Plate Mounts Upgrades for Ender 3 Pro,Ender 3 V2 3D Printers (Linear Rail NOT Included)

So as a whole this kit works fine, when paired with a proper linear rail (not a cheap one off Amazon) the motion is smooth and unrestricted. The brackets work fine and if you use a rail with 25mm spaced holes then the kit fits snuggly between the two brackets for the z rollers too.One issue with this kit is that the hot-end plate is moved several mm forward, the endstop triggers fine with the included spacer but the x-belt is only partially held by the slots in the original plate. There are probably workarounds but it would have been nicer if the bracket recessed better.

Read a handful of negative reviews on this product mentioning it wobbles. This product is fine if you tighten the screws.If you like it loose.. don't quit your day job as you'll get nothing but problems.

This is a well worth it upgrade to your ender 3 just be sure to print the alignment tools before you pull your printer apart and be sure to get a good quality rail.

Easy-ish to install, but it introduces too much wobble on the heated bed. You can compensate for the wobble when attaching the Y plate by adjust the tension of the screws to the MGN Rail mount. But as you level the bed the wobble creeps back in. I have spent a week trying every which way, but still no joy. The purpose of adding MGN rails is to make the axis more rigid and less prone to wobble. However this kit adds more wobble then the standard bearing wheels on the Ender 3 line of printers.

yeah okay its the cheaper chinese version... but it really does make a huge difference compared to chunky wheels, yes you get smoother prints, yeah it runs a lil quieter... no probs

like, easy to install.

I purchased this a long with a BIQU rail. The BIQU rail on my X axis was great. No slop, no wobbles. I installed a long with this kit for my Y axis. The kit itself is easy to install and good quality but there is very bad wobble on the bed after installing. It can move +/- 2mm. Yes it takes force to do this but, it doesn't do this using the standard wheels. If you want to use linear rails on a bed, you would need to redesign the mount to use 2 linear rails, on each side of the extrusion, not on the top. This should take up the slack.Just to confirm it. I removed my X axis rail (including the slider) and put it on the Y. Same problem. This is not a rail problem and not a unitak3d kit problem. It's a design fault. You can still print with this however, don't let your nozzle hit the bed. Don't move the bed by hand. As soon as you move the bed by hand, you have to re level. I will keep using my ender 3v2 as is, with this kit installed but In the future I will be upgrading it to dual rail somehow.

The quality of the kit is good (as usual with UniTak3D parts). However the design is poor... it reduced the maximum print height by lifting the bed up, this results in less stability, vibration and a loss of build heignt (~20mm). A better design would be a twin rail system but unfortunately UniTak3D dont offer this option. If I were to make one suggestion in the design of this kit, it would be to include a predrilled bed that bolts directly to the bearing carrage, not a plate and spacers to bolt the bed to.