Hi, the outside picking pattern I’m talking about is the second video in my post above. I’m not playing at those kinds of speeds there, though I have done it in the past. No video, and genuinely don’t know if I’d be capable of it anymore.
I was something of an alternate picking purist when I was a teenager. I know that I could do that pattern as 16th note triplets at 140 because I was able to play Steve Morse’s Tumeni Notes at that speed (14 notes per second), and I was often able to play that pattern as fast.
In more recent years, my tastes have moved away from the hard, percussive sound of alternate picking and my alternate picking chops have declined.