Krisztián Hofstädter showed this demo in the OpenBCI forum in 2018: https://openbci.com/forum/index.php?p=/discussion/1663/greentek-gelfree-s-eeg-cap/p1 Here is EEG setup which he showed on 20.11.2018 on his YouTube channel: Picture potentially taken before the OpenBCI EEG heatset training: Picture potentially taken after the OpenBCI EEG heatset training: