Tie: Captured Overhand Cuff

Based on this tutorial.

This is a cuff that will not collapse or loosen regardless of which direction tension is applied. It involves an overhand knot that is "catpured" from both sides, keeping it stable.

1. Tie the first wrist with doubled-rope.
2. Bring the rope towards the second wrist.
3. Make an overhand knot with the 2 strands. This knot will be the inner-most point of the second cuff. This controls how closely the wrists will be tied. I will call the space before the overhand knot, the "overhand space". It's not a problem if this overhand knot collapses into a half-hitch.
4. Wrap the wrist with the doubled rope and bring it through the overhand space. Pull it to close the cuff to the desired size.
5. Wrap the wrist one more time and it bring the rope back to the overhand knot again. I will assume the wrapping is going downwards on the wrist.
6. Any further wraps should be in the same direction. Only the first wrap should go through the overhand space, otherwise it will get quite crowded.
7. Bring the rope upwards, over all of the wraps, then downwards inside the wraps and pull back towards the first wrist. Ensure that all of the wraps are the same size.
8. Bring the rope to the other side of the overhand knot and make a half-hitch around the 2 strands of rope there and tighten it against the overhand knot (there is 1 wrap between it and the overhand).

Tie: Lark's Head Double Column Cuffs

Based on this tutorial

1. Form a lark's head and place it around both columns with the lark's head in the middle of the two columns.
2. Add 2 more wraps going up the columns so that there are 6 strands of rope around the columns. You now have 6 strands that go above and below the columns.
3. Pass the tail of the rope downwards through the bight formed by the lark's head 
4. Pass the tail of the rope under the lower strands of rope (going upwards relative to the columns)  then wrap it back over the top strands (going downwards).
5. Pass the tail of the rope downwards through the lark's head bight. This captures the entire upper and lower set of strands.
6. Adjust the tension to bring the columns together as much as desired.
7. Holding the knot under tension (if possible), open a bight downwards and on the opposite side from the lark's head then pass the tail over the top of the strands.
8. Pass the tail back under the upper strands to wrap them and pull them through the bight to form a half-hitch.
9. Readjust the tightness if needed.