I just finished my project 'dog leash' no instructable yet because i'm working out some things, when making another one i'll make a nice instructable to go with it.. for now..
1st photo is the completed project
2nd photo is with flash, so the black reflecting paracord is better visible
3rd photo is without flash
4th a close up of the adjustment point
5th photo simple setup with a 4kg counterweight en rotate able wooden disk:
total used paracord, 8 strands.. total 30.40 meter or 3040 centimeter .. all braided with the kumihimo way (made my own disc etc)