I remember seeing on YT on EEVBlog where Dave 2 (or David as he prefers) built a prototype class 3d printer that was open source. He built this as part of his university thesis, but was thinking of selling them as open source machines, maybe as a crowd funded project? I searched through all of the EEVBlog videos to see where he actually demonstrated this printer and could not find it. Does anyone remember if they have seen this, I would like to get the link and see this printer in action.