This is a beautiful acoustic piece that I believe could become a real classic of the genre (hope that doesn't sound too pretentious!). Thanks so much for taking the trouble to produce a set of video lessons showing how to play it properly (though I have not yet been able to find Part 4). The new camera purchase has certainly paid off; the video looks and sounds fantastic full screen at full HD resolution.
Thanks also to you and Dario for producing the score to back up the video. Given all your efforts, I hope you will forgive me for pointing out that there appear to be some errors and inconsistencies between song and tab just in the first few bars, which is as far I have got so far. The main point I would make is that D Mixolydian (i.e. key signature F#) would seem a more suitable choice of key than D Major. It may be the choice of D Major as the key signature which led indirectly to the bend at the end of bar 1 being shown as a full bend rather than a half bend; the former (if you can do it!) would take you to C#, which, though consistent with the key signature sounds wrong. I am sure it is meant to be a C natural, hence the choice of D Mixolydian.
I realise that this is not likely to be a problem if you are using the video lessons as a reference, but there may be people who for whatever reason need or want to learn the piece from the score. In any case, I'm sure you would want the definitive score to be correct!