Creativity Upgrade Y axis Linear Rail Guide Kit MGN12H 300MM Length for Ender3 V2/Ender3 Pro 3D Printer

Went with this solution because it supported 2 rails on the X axis. Easy to install. Took some time to set the alignment but I used my calipers and not the printed guide. Would buy it again.

Rails came bent which caused binding. Poor quality trucks. Holes on brackets do not like up.

overall installation experience is not as bad as others say. I was having issues where the included 3d printed bracket for the stop, was short as well and the bed would run into the motor. after staring at it for about an hour, I realized my bed was backwards so I rotated it 180 degrees amd it fits perfectly.Using on my Ender 3v2.Also needed to lubricate the rails since they felt rough.

The holes, according to the I structures, should line up properly. 2 out of those 4 holes don't line up, so it won't fit right. This is suppose to fit an ender 3, but it barely does. Edit: You have to turn the plates that mount to the linear rails outward for an ender 3. However, the rails I got were missing ball bearings and now the whole assembly clicks when the mounting plate moves, and it doesn't move when everything is tightened down. Edit2: I got a second one as a replacement, and I noticed that when everything is tightened down, the plate is hard to move. This will need some adjustments

The media could not be loaded. Easy to install, the rails are smooth and my print bed doesn’t wobble anymore. Definitely improved the print quality. First time installing rails, I hope they last long and require less maintenance. Happy about the product.

Works great and easy to install. Bearings are a little rough at first.

The rails look fine, but the carriage refuses to move smoothly even after applying oil and attempting to break it in by just sliding it back and forth a lot. The force required to keep it moving with my hands is indicative that it would cause huge print issues if it was being moved with stepper motors. I returned it once and got a replacement thinking it was a fluke, or a dud, but the replacement is doing the same thing.**These overall are not quality rails, do not buy**

I bought the bracket set without the rails after returning the full kit since the rails were gritty and sticky even after cleaning/greasing. I bought a set of black coated rails I used for the z axis and they are much smoother.The bracket set assembles fine and comes with all the hardware you need.There were a couple issues:1) the included Y end stop is about 20mm short for the Ender 3 V2 so I designed and printed my own2) when mounted the build plate bumps into the belt tensioner which prevents you from using the max 220mm size and throws off the y axis. This could be a problem if printing anything close to the edges. You might be able to adjust the rails slightly to avoid this but instead I ordered the Creality metal tensioner which doesn’t have any material at the top and is flush with the top of the y axis extrusion. This should let the build plate clear the tensioner and put me back to 220mm. After measuring, if I slide the rails forward it could extend the usable size to about 230-235mm which at the very least could help the BL touch sensor with screw tilt leveling in Klipper and generating a more symmetrical bed mesh.Overall the print was very clean with just manual bed leveling and printing at 200% speed.I’m happy with my decision to ditch the POM wheels.