5mm thicker bottom (halfcaptive) bottom module clip - so that the bottom (first) clip is fully enclosed by the clip guide, and doesn't feel loose or wobble when you move the blaster
Check out my other parts for the Thumper - https://www.printables.com/@JoonChor/collections/2652758
The author remixed this model.
5mm thicker bottom (halfcaptive) bottom module clip