Where to find the PCB schematics?

Yes with any luck we can change the world :-) Right now I'm in every continent except of course Antarctica. It's been a really neat experience, one of those "only in the 21st century" sort of vibes. But I can't get too megalomanic yet, I gotta get the work done first so it's bulletproof. Yeah the Mendi is 300+. We can do something equivalent for - I shit you not - $10 in parts, maybe another $10 for some nice digs for it, and still have it be state-of-the-art. They took the App from Brain Trainer's software and just streamlined it also, nothing original. I worked on a similar headset for another company that's unfortunately going to get priced around the same even though I lobbied my best to get it to <$200 (it's also what I agreed to originally). It's definitely easy to cash in on biofeedback tech right now but it's highly immoral IMO, I live in a country where health care is considered a luxury though and the mentality of "I made a thing therefore my margins need to be 7000% because I'm god and you need it so you won't complain" is a plague, just try buying an Epi Pen or Insulin. There's a lot of careerism too, a big barrier has been convincing talented people to say fuck the glory, fuck careers, fuck IP and other self-fellating ideologies - let's just do some good for the world using knowledge we've borrowed from our progenitors who mostly did it for free or for shit-pay in a university somewhere because they believed in what they were doing. We're not here for long, a lot of us die randomly and brutally and never even get the chance to experience life in its fullest, so let's make our time worth while and special and quit playing stupid money games. We ought to have more public institutions for pure innovation and outreach, everything is politicized or financialized. RE: HEG + TES type stuff, I'm not going to be focused on invasive procedures for the foreseeable future, it's a bigger gray area and like you said there's so many unknowns. I'm personally more convinced in the effectiveness of non-invasive blood flow/breathing therapy with the HEG than anything else at this point, because it's doing so much for our most basic physiology which support our complex brains, and the cumulative effects of stress or trauma especially in early development are still highly overlooked yet also highly treatable through these sorts of avenues. The HEG adds reality testing more than anything.