Original idea of model is great to utilize very common and cheap brass brush cleaning tool with 3.0 shaft.
Unfortunately at least my environment, with BIGTREETECH hotend, it breaks this model due to too narrow brush hight that makes more pressure for the open point of models.
So I just mod the model to make the close style and making more brush hight to increase compatibility for any hotend :-)b
Example of brass brush.
https://www.amazon.com/20PCS-Brass-Wire-Brushes-Accessories/dp/B0CR3ZBWTF/