You get better results if you scallop deep grooves into it at a heavy angle, exposing the inside more than you'll get with most laddering dies. If you can find some really course rack gears, you can use that, but the more aggressive the better. Even still, it's not a pattern that blows me away.
You're mostly just looking to expose sections of the core twist change. Angle is important, because with a twist, much of your layering re-orients toward vertical. When laddering a typical lateral pattern, you're creating a depth variation by changing the concentration of the layers, when they're oriented on top of each other. In a twist much of what you accomplish is simply to upset certain layers into themselves, so the distortion is much less significant.