y-axis belt tensioner (Prusa i3 Hesine)

This is an effort to be able to easily adjust the tension on my y-belt, without any new holes in my Prusa i3 Hesine chassis.
A bit over the top, undoubtedly, but it works, much much better than the way the original design wanted us to do it, and it was fun to make. ;-)
I printed it all in one go, but for the little round thing, which I reprinted with a layer height of 0.1mm. It looked a lot better then.