If the metronome I use is correct, the intro is around 120, and the song is around 105...
I listened guitar accented notes in intro to figure that, and in solo, I listened the drum
(you used EZ Drummer/Superior Drum or what? ;) )
I hate digital gadgets, so I use this simple online metronome, that reminds me of old
mechanic metronome and it's quite good.
http://simple.bestmetronome.com/
The intro actually goes dorian, when ascending, and natural minor, in descending lines,
except in the middle of the second bar where both, ascending and descending parts
are natural minor. At first I thought it was just in case with palm muted notes, where it
happens that palm muting raises the pitch almost half note higher, but that isn't the
case here.
Actually I assumed you did this intro on the spot, just like the solo sounds very much like
first attempt improvisation, and that's the magic here.
You probably did this dorian/natural minor swing unconscious, but it's amazing classical
approach like in the case of melodic minor, where notes in descending case turn into
natural minor.
A transcription service, you say? Not bad idea, not at all. ;)
Anyway, do more songs. :)