Surely you could alter the length of the ropes/chains to her wrists and the height of the crotch rope to keep her on her toes. That way, even a small movement of the crane would unbalance her and mean she'd have to move, rather than the crane fighting against her weight the whole time.
there's no points of tension on that knot so it'll just pull straight through.
If they use their weight to fight against the crane, they will be punished. Tie it to your preference with as many twisties twisties~ as you like.It kind of goes like this.Done!Puuuull~See? Isn't it easy?The victim will be subject to the "Follow along with the crane, or else..." type play, y'know? Crotch rope.Outline for crane-type crotch-rope device The arms are bound to the crane, so when it moves, it forces the victim to walk, y'know? Movement powered by crane. As for the structure... you all don't need to know about it, y'know?The crane easily repeats the back and forth motion. yes, yukkuri jokeThis!omakeI wondered if I could actually tie this kind of knot, but it turned out easier than expected.Twist~Tie lots of these kind of knots along the crotchrope.When they move, their crotch will be rubbed by the rope, y'know? Lotion is generously applied to the rope. Since the victim will be subjected to this for long periods of time, the lotion will make it feel nicer for the victim, y'know? I've added shackles to the feet. It's better knowing that they can't possibly escape, y'know?