After trying the original model and finding that my TPU filament was unable to hold together after a few months in use, I decided to modify the model to make it more thicker in a few areas, and also using the my spline fitting upgrade model. The main changes aside from the spline fitting, is the increases arm size, and increases bristle size. If I find this still has issues, will update it with whatever my latest version is.

You can find the full side-brush upgrade module here along with the Blender file: https://www.thingiverse.com/thing:6935711