Summary

Save a ziptie or two - Make a Belt Biter!

I might eventually adjust the design so that it loops around the belt, to avoid risk of it falling off by accident. Otherwise, it's as basic as it looks. I currently use a belt tensioner and have not tested the longevity of this design.

Print settings should be obvious. Print enough walls and top/bottom layers with decent infill. It's not a lot! Beware of bed adhesion with the filleted corners - use a brim if needed!