Speaking for the flies on the wall, I’d appreciate it if the conversation was public.
Excellent comments, @Joao667. I had never explicitly thought about it, but I realise that I’ve been exploiting these preparation movements. I always just focused on making the changes in escape direction feel as gradual and smooth as possible.
I also totally agree about the outside ascending swipe in USX, I think it was a systematic element in Shawn Lane’s picking.
Oh, don’t worry about that. This kind of curiosity is very good and perfectly valid.
I think you can ask here; it might be interesting for other people too. Besides, I’m very happy to be able to help in any way I can.
And of course, I will answer what I can within the limits of the information I’m allowed to share. If it’s something very specific, and I can’t explain it, we’ll have to wait a little longer until there’s an opportunity to release material on that topic.
Feel free to ask!
I’ve curious about this because I can do things like inside Gilberts (3 notes on G string, 1 on B string, start on upstroke) pretty well with 2wps, definitely much faster than I could with my (poorly-developed) DBX.
Am I on the right track when I say that the “descending” movement feels pretty similar for both inside picking and outside picking, and similarly for ascending? I.e., there are four string change movements, but it kinda feels like two?
And is it possible to play pure 1nps lines (like rolls) with the same type of movement? Or is a separate wrist DBX necessary?
Last question 
: is the middle finger brace just to reduce torque on the index finger MCP joint?
Yeah, I always mix those two up.
So you like doing that Paul Gilbert lick with inside picking, right? That’s great! If you can and want to, record a clip showing how you do it with inside picking and then show the same lick with outside picking, and we can all take a look together.
Right! Four string change movements:
1- Ascending outside picking 3- Ascending inside picking
2- Descending outside picking 4- Descending inside picking
Believe me, the feeling when playing each of them is different, but I’m sure that if you understand how to apply each of them logically, everything becomes easier!
Regarding 1nps, you can play with combinations of different movements if you want, like wrist + forearm motion which are super efficient. Here’s a great example from Troy:
But what really matters here is what kind of motion you master. If it’s only wrist motion (RDT/DT) bet on DBX for lines like that. If you do some combination like the first one I mentioned, try doing 2wps even for 1nps, because actually a two-way pickslanting player doesn’t stop doing DBX, because the semicircle always happens when changing strings.
Regarding your last question, if you are referring to the grip and finger motion in the style of Kiko Loureiro or Martin Miller, my answer is yes! I’m not good with that kind of motion, so I avoid it as much as possible. But I don’t think it’s a problem for other people.
Let me know if that’s what you were asking.
Forgive me for any misunderstanding on my part.
Oh, sorry! I was referring to the second finger braced up against the first like this:
I’d upload a clip of the Gilberts but currently don’t have the ability to record video for a very stupid reason. Thank you, though 
The rest of this makes sense, I think, thank you!
Oh, yeah! I do it precisely for that reason. This way, the movement of the index finger and thumb is much less likely to happen. It can still happen if there isn’t enough pressure, but much less than with the more traditional method.
Don’t worry, you can record an example of this whenever you want.