Creality Ender 3 dual z tensioner

I have designed and printed this tension arm for my Ender 3 dual Z-axis upgrade. The upgrade system I have used features two spindles with two separate stepper motors. To keep them synchronized, I wanted to connect them with a timing belt. You could also use this pulley to create a complete DIY dual Z upgrade.

Parts:

-Toothles Idler 

https://www.amazon.de/-/en/dp/B09WTWR5HF?psc=1&ref=ppx_yo2ov_dt_b_product_details

-GT2 Timing belt with Idler 

https://www.amazon.de/-/en/dp/B08YYF67TR?psc=1&ref=ppx_yo2ov_dt_b_product_details

-Dual z-axis upgrade kit https://www.amazon.de/-/en/gp/product/B08B6B5SMG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

-Cylinder head screw m4x30 with nylon nut and washers