Thanks for kind words, SearcherTMR, it was never my intention to motivate or mislead people into building tACs devices or start a career as a tACs salesman. 40Hz symmetrical square wave is a good approximation to the sine wave, instead of the asymmetrical pulse wave, in fact I think some kind of 40Hz excitation to the pre frontal cortex during REM should work.
guess what I was trying to say is this will not happen overnight, and takes patience (at least 2-3 months), hits and misses, practice and real desire to LD. It is important to pinpoint when you hit REM sleep and unless you know this accurately it is just trial and error. If anything it helps you become more aware of the body rythms, REM sleep patterns and give a better control of your mind.
It started off as a fun experiment for me and did try all kinds of techniques, supplements tACs, binauaral, Remy etc in my search for LD. but what worked first was tACs, so whatever combo helps improve your chances , why not? It seems like just another acquired ability like playing the guitar or learning kung-fu. Then after a while it makes you wonder what it is that achieving lucidity does? Entertainment, escape from reality...what is the purpose? I do admit it is fun though to indulge in this form of entertainment if you willing to spend the time and effort