Ender 3 and Ender3 Pro  X  Y Belt Tensioners
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Ender 3 and Ender3 Pro - X & Y Belt Tensioners

I made some changes to the original Design Added Ender 3 version of YAxis tensioner Uses M4 screws and insert instead ...

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Ender 3 and Ender3 Pro - X & Y Belt Tensioners alternatives