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 Muharik Khalifa

I got these to upgrade the non-adjustable and kinda flimsy X and Y axis' on my Longer LK4 pro. The Y tensioner goes on with no changes and is strait forward. The X axis though required some simple modification to make work perfectly. As it arrives the off side contacts the right side gantry frame. So I had to cut approximately 4.8mm off of the end so that it would allow the bolt holes to line up with those already on the X axis frame. I know this part is probably designed for creality style 3d printers but it clearly works if you are willing to tinker. The only tools needed are a vise(optional), a hacksaw, sand paper or files, and a means of accurate measurements. I used my calipers to measure and score a line across the part to be cut, then clamped in my bench vise and hacksawed it. I then deburred and cleaned up the surface with files. With this change it will fit the longer lk4, lk4 pro, lk5 pro, or their clones like the alfawise u30, and u30 pro among others. I also took the liberty of changing the idlers on the new tensioners to black ones because just like flame stickers and fart cans on hondas, looks means better performance.