That is a novel idea. I’m having a hard time picturing how that results in USX, but I could see it working for DSX. I would imagine arm against an easel would work for USX.
Update: both USX and DSX are now at the same tempo, even number of notes per string 16ths at 208. I actually stumbled onto a different motion when I was trying to do my DSX thing only supinated - %$&@!! DBX…
Hmm might actually be what I originally used to use to play before my stroke/aneurysm 13 years ago. I guess that on the bright side I can now do all that cascade stuff the way it was intended…
DBX is at 0 lol
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I think I do everything DBX, and I just start warming up at 110 BPM lately. If something feels off once I’m playing, I normally drop down to 140, which tends to be a tempo that I can do most all difficult passages at.
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lol I am jealous. Awesome, man.
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Can you film a clip of both? I’d like to see the similarities to make sure I’m on the right track. These are perfect tempos for what I hope to get to.
Also… what is DBX?
It’s where all the upstrokes escape and all the downstrokes escape. Steve Morse is probably the most famous example of the virtuoso rock crowd.
I don’t think everything you do is DBX. I think you can do DBX but to me your fastest stuff is mostly single escape and you’re great at doing what you need to do to get the notes that don’t work out to the primary escape. So that’s more a textbook definition of “mixed escape”. I could be wrong (I am often). Either way, your playing is always awesome 
So it doesn’t really matter what I think lol 
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Ah. Gotcha!
Love Steve Morse! Petrucci talking about him is what got me to check out Zappa after reading Vai mention him in every interview lol
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That’s fair, I haven’t analyzed myself enough to be sure one way or another. My only reference point is that I can play lines that people refer to as DBX.
Thank you for this! I always take feedback so your thoughts matter lol.
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I think it could help if he has the same problem as I did.
I was doing some 8-2 motion and couldn’t break out of it. Whenever i tried to do any dwps arm/hand position my right hand just did the same 8-2 motion no matter what. The desk thing is just a reference that worked for me, but ultimatley what happened was that if i locked in to that position i needed to position my arm way more pronated then earlier, this resulted in 8-2 motion feeling unnatural during continous dsx motion and i probably ended up doing more 9-3. When locked in to the position and doing 9-3 all i needed was to position my arm like Troy shows in the wrist usx on youtube.
Does that makes sense? 
It’s just my own theory why it worked for me, but i haven’t checked with cameras or anything like that.
The concept makes sense. But a desktop is horizontal therefore the guitar would have to face the ceiling, right? Wouldn’t it be easier to use a wall?
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A wall works as well, anything ‘‘flat’’ really. Just to be clear, you don’t wanna lock your arm whole arm into this position, but just keep it as a reference for the ‘‘hand position in relation to the lower arm’’. Another way to phrase it is, don’t flex or extend your hand after the ‘‘against the wall/under desk’’ reference.
Now, i do alter my hand a bit, but when i discovered the motion i forced myself to play in exactly that position. It felt super akward and weird but it removed the ‘‘how do i get over the string on a upstroke’’ to ‘‘all i have to do is alter my arm position a little bit’’.