Probably not a good idea to go only by the sample strokes. You should make your own so you know the entire process.
Another thing to keep in mind is that because the strokes are limited to specific length intervals, they may not match the edge lengths exactly in the model. This can sometimes create slight overruns or gaps but those would be common in hand drawn images, too. This image was done using the sample strokes. The gap indicated by the arrow is due to the face that there isn’t a stroke short enough to overlay the vertical edge. If you were to zoom in enough, that edge would become visible.
Style Builder is intended to allow you to make styles that invoke a hand drawn appearance.
Another thing to think about with Sketchy styles and short edges is that curves-if they are exploded-can disappear entirely. Here I’ve exploded all the curves in the foreground object and applied one of my pencil styles.
And the same style with all the curves welded.
Eneroth Auto-Weld is very useful here.