Building a submarine with full buoyancy control? YES! Also, visit http://kiwico.com/diyperks for your first month of selected crates COMPLETELY FREE! You can check out James's finished (and now working!) submarine here! https://www.youtube.com/watch?v=kEanKJhZvA0 OFFICIAL LINKS: Support me on Patreon: https://www.patreon.com/DIYPerks/ Official Website: https://www.diyperks.com/ Discord: https://diyperks.com/discord-server/ Forums: https://diyperks.com/community/ Twitter: https://twitter.com/DIYPerks