Anet A8 X-Axis Right Tensioner 45mm

After seeing how well [wschadow](https://www.thingiverse.com/wschadow)'s [X-axis tensioner](https://www.thingiverse.com/thing:2786603) works, I wanted to replicate this for the Anet A8 / AM8.

I've designed this from scratch, you'll also find the F3D file from Fusion 360 so if you don't like the tolerances for the bearings/z-axis nut, you are welcome to change and re-print. I think

I've got the bearing diameter set at 14.9mm because at 15.2 it was a bit loose. Might be worth just dialing i