This design can hold 1 GoPro, 2 batteries and some attachment parts. For assembling the box, you need four M2 x 20 (mm) and two M3 x 14 (mm) screws. Please don't forget to leave a like because I'm making a 1 meter 80 cm Humanoid robot with my team, and we can really use some gift cards. We are uni students from Australia, and we are developing everything, such as AI and the full design. Also, we are trying to fund it all by ourselves at the moment. Thank you for your help and hope to see you later.