I’ll set up an account or I’ll stick a video here but I’m not asking for help now, I’m saying I’ve achieved an oddity.
I’ve used this site to sort out the technique I think I first started with and could not make work when I was 16. It’s forearm rotation with some elbow mixed in and it produces double escape.
I wrote here a few years ago I thought my error trying to play fast was that I should be playing on the top of the string not on the sides. It was only when I used this site and a bit of my own stretching techniques to release a sticky wrist and found I could do a double escape wrist tremolo and knowing the feeling I went back to my first technique and found it too is double escape. It still feels like I’m playing on top of the string not falling off to the side. It’s not the description used by other players on the double escape technique page but it feels correct to me.
I think my first technique is an unlikely find for players because its too quiet for acoustic and because it has no muting so is avoided on electric.
I can do inside double escape and the same direction to swap strings but my outside double escape is not there. This means I think I can pick all the notes of a three note per string scale and so you would call it economy picked until I get to the turnaround which I alternate pick as its an inside double escape. With practice I can alternate pick pectatonic threes and can find my way to do pentatonic fours and major threes using a mixture of alternate and same direction double ecsape.