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 Michael Onwukaife

I bought this one and the installation was pretty easy even without instructions. Considering that it is the Y belt it is a lot easier to remove the bed to get the belt around the pulley properly rather than finagle with long needle nose pliers to get it into the slot in the bed.The tension is great, put enough tension on it to get it taunt, powered it up and everything seemed fine until after every print the Y carriage would literally bump n grind. It was hitting the both ends as well as making a grinding sound. I thought I might've somehow had a bad servo, end stop switch, etc. I spent two days scouring