Hi! Thanks for the details and sorry for the confusion here. Downward pickslanting doesn’t require forearm movement. Mike Stern and Albert Lee are two good examples of how you can use just the wrist and still have an escaped upstroke. Either way, I think we gave people the wrong impression with that particular Chapter in Volcano so I apologize.
There’s nothing wrong with forearm movement, and you can check out @qwertygitarr’s posts for a great example of what it can look like when you use mostly forearm for dwps. But when I do this, I tend to use a blend of forearm and wrist. Here’s what that looks like:
You’ll notice there is some arm movement, but there is also wrist movement. These two joints working together allow the pick to trace a path which is mostly parallel to the pickups. There is no other way to get this motion path without combining these two joints. It doesn’t really feel like turning the arm, and it doesn’t feel like a pure wrist movement. It’s somewhere in between.
When I do this motion with alternate picking, as in the first few examples, I cannot feel the tracking movement. Meaning, I am not aware of sliding my arm across the strings. That’s how gentle this is. Part of the reason is that the arm does not move the entire way. It only moves about an inch or so — the wrist does the rest of the tracking. So when I’m playing on the top strings, I have slightly more ulnar deviation than on the low strings, where I have more radial deviation. The fact that the tracking movements are blending — arm and wrist — is what makes it feel like I’m not moving very much.
When I do the 3nps sweeping version of this, I am slightly more aware of the tracking motion. But the tracking movement is not involved in the pickstroke. The arm is just “falling” very gently down the strings but not applying any pressure. This is why it feels like the pick is not digging in very hard.
In your case, during the sweeping motion it looks like the arm is pushing more forcefully through the strings, and that’s why I’m saying you might be getting confused between the two movements. If you want to experiment with a different approch, you can try this one, where you make more wrist motion and the arm is less involved. Even if you decide to keep the motion you have, maybe this will give you some understanding of how to use less arm force and not get stuck.
In general, if you want to work on this, I don’t think of the arm turning at all. Instead, I imagine that the picking path is parallel to the pickups, and I just try to move that way. This will naturally create a combination of wrist and arm, since that is the only way to move that way. It doesn’t have to be exactly parallel - but it will be more parallel than pure forearm, and more parallel than pure wrist.
Anyway just some suggestions. Your playing looks and sounds good and I’m sure you can smooth it out a little.