Hey guys I came across one of his books the other day and bought it. He opened lots of doors in my music with his modes video. (GO GET IT! It's my bible to improvised soloing...Highly recommended!!) If you've ever seen him play he's got a butter smooth picking technique that amazes me everytime when I see it.
In his speed picking book he talks about a different style of speed picking (shredding if you will) by combining alternative picking with a bit of sweep picking in 3NPS runs. So for example if we picked
we'd normally go up and down all the way. His technique is, on the 2nd down on the 3rd fret (talking in terms of starting off on a down stroke) instead of picking the next note with an upstroke you do a little sweep (lol 2 string sweep :P) and strike the first fret with a downstroke. So instead of down-up-down-up-down-up he goes down-up-down-DOWN-up-down and so forth.
It felt sort of weird at first and very awkward (especially goin the opposite way ie. down-up-UP) but after playing some of the excercises and getting use to that technique I can feel my right hand having an easier time in some passages than when using alt. picking.
Mixing alt. picking and gambale's speed picking works pretty well in some tough passages. I don't know how well this will work for you, but I figured it's interesting to share.