Look, ma... no string.
A truly successful stringless tangle is pretty rare for me. That strong, silent little pencil line is as necessary to me as the tangle patterns themselves in keeping the zen/building a decent tangle. I have found that I really need that structure to work within. You know how wild those tangles can get if allowed to run unleashed... they need to be wrangled into some semblance of order, or they'll be chasing squirrels and stealin' ice cream cones in the park. :oD