Looks like this is the first self-tabbed piece of music. It was the first self-tabbed piece of music myself....
The solo of the song Down is very structured and easy. You could cut it in 4 equal parts. The glue between these parts is the repetition at the end of the first three parts.
The first part reminds me of 'Child in Time' of Deep Purple: The moment Ritchie Blackmore
just presses the pedal to the metal while repeting a bend-up. This is a nice start and it sounds more difficult than it in fact is. Mention the alternate picking
The tapping part allways reminds me of Eddie van Halen (.....how is that possible...), but I top very slow over here.
I tap a Bminor, a Dmajor and an Asus4 over the rythm-section what plays an Bminor, an Amajor and a F#major. I think it sounds fresh and contrastfull.
The third part reminds me of the triplets playing of Dave Murray of Iron Maiden. Perhaps it was the song 'Phantom of the Opera' flewing through my vains.
The fourth part is mainly a pentatonic riff in Bminor to get fluidly to the next chorus.
All mentioned axe-men and bands only applies for some background information to mention where I used to listen to (and still listening to), and their legacy was inspiring to me. It is certainly NOT the intention to compare my very infirm guitarplaying to mentioned guitarvirtuoso. I'm not worthy.