Aaaah, yea, that does make sense. The loop pinches both ends, so a loose end doesn't matter as much. Sorta requires the knot to be pressed against something,

Aaaah, yea, that does make sense. The loop pinches both ends, so a loose end doesn't matter as much. Sorta requires the knot to be pressed against something, but that's probably frequent enough in practice / can be designed for (e.g. a knot that's bigger than the gap between things it's wrapping). Thanks!