Hi everyone, I hope I am not too late to the party. This is my entry for the Crealilty Global DIY Creative Modification Maters Contest. The device you are seeing on top of the ender 3 is a multi-material and color upgrade for FDM 3D printers, it is affordable (80$), widely compatible and allows to print with up to five different filaments. This has been in the works for the past year and the Bowden version is working perfectly. The direct drive version that you are seeing is still a work in progress but should be reliable enough in a matter of weeks. If you have a different printer do not worry. I am making this upgrade compatible with as many printers as possible and any 3D printer running Marlin should be somewhat compatible. If you are interested in building one for yourself checkout the links below: GitHub: https://github.com/PierreMasselot1/Material-Switching-Unit Discord server: https://discord.gg/Z6RApfkKpK Patreon: https://www.patreon.com/pierre_masselot Youtube: https://www.youtube.com/channel/UCF2tb5Hu6G_z-tB3_e_9U4A Enjoy!