Review on Befenybay 2020 Upgrade: X-Axis Synchronous Belt Tensioner For Creality Ender-3/Ender3 Pro/Ender3 V2/CR-10/CR-10 V2/CR-10 V3/CR-20 Pro –Straighten And Stretch For Enhanced Performance by Billy Reeves

These products should be on the stock Ender3 printer, as they solve alignment issues that the X and Y belts have. Not only does the smaller diameter toothed pully make the axes more accurate, but they keep the belts centered and stop them from rubbing on the frame extrusions.The normal Ender3 config uses the X2020+Y4020 configuration.Installation on the Y axis would typically require you to remove the bed, but I was able to disassemble this new part in order to get the belt in it without taking the bed off. There are two spacers on either side of the toothed pulley-bearing assembly that as near impossible to fit while also feeding the belt, but I used hair spray to stick them to the sides of the new part and keep them in place while I reassembled. This was still very difficult and takes a steady hand or three. I did this because realigning the bed once you have it set is quite annoying.On the X axis, installation is easy as you can unhook the belt without removing other parts in order to feed it through the new tensioner. However, I did have to tighten the new part almost all of the way to get the tension set properly. Ideally the belt should be shorted a slight amount, but that would require adding a new crimp to it.Overall I wish I had been running with these pieces from the start, they eliminate the questions of alignment and tensioning when you are tuning the machine and working through print quality issues.