I've been playing this song for years I could do it in my sleep.

To practice the beginning of this solo to be played effortlessly play it like this:

Bend the 12 fret on the G string 1 whole step, then downpick the 10th fret on the b string and same on the E string (10th fret), then up pick the 10 fret on the B string, downpick the 13th fret on the B string then pulloff to the 10th fret, then repeat the whole process over and over again.

At this point of time don't worry about repeating the sequence only four times....do it over and over again. Make it into an exercise. also play it up and down the neck.

I too remember how hard it was for me when I first learned this solo and created the exercise I just explained.

Keep at it and in no time you'll be playing it effortlessly as well.

IMPORTANT!: Play it over and over and over at a very slow tempo...the speed will come in time. :-)