About this 3D model

I first want to thank Matt'sHub for coming up with this design, as I followed his tutorial to make this. He did not provide his design in the video, so I decided to design one myself. As such I have provided the 3D models, as well as a link to his YouTube video explaining exactly how to get this to work. LINK HERE:https://www.youtube.com/watch?v=Y5i8zhM_jAo