We wrote some reviews about Krisztián Hofstädters OpenBCI EEG setup with the Greentek Gelfree S3 EEG cap and some reviews about Richard Davidsons studies with long-term meditators: https://www.pnas.org/doi/10.1073/pnas.0407401101 Shortly after that Krisztián Hofstädters OpenBCI demos disappeared from his YouTube channel. And instead of that the Unicorn Black by g.tec medical came on the market, which …