Holding the belts with zip ties is giving me trouble. The zip ties seem to loosen up just enough to let the belt go one notch each time there is trouble.
This piece of plastic goes between the belts, underneath the zip ties, and make the zip ties work more like a circle than a flat rectangle.
The images show the before and after. The part is the clear plastic in the belt.
Update, added belt_clamp_2_small to try to fit into smaller spaces