I've been interested in tDCS (trans-cranial direct current stimulation) as a means of improving muscle memory and performance for musicians for a while in an abstract sense, but a company thinks they've come up with a mass-market device that works well. I was extremely cynical about it, but thought it worth a test. The thing is called the 'Halo Sport', and claims to improve performance in athletes and musicians. Mine arrived the other day and I put aside enough time in each day to do a proper practice session, come what may. Therefore, I have been doing a personal trial and am also keeping a video diary. I love to play the guitar but am also suck pretty hard at it. My idea was to see whether the device could help me get past some of the limitations in my (very bad) guitar playing. This is the first part.