Wall jump over the top of the piston and split, leaving Y1 in the curved platform between the two pistons so that the left piston stays in motion. Leave Yarny 1 hanging here to keep the piston in motion, then have Yarny 2 go left under the piston (which can kill you), wall jump up, and push the circular gear to the right so it fits into place, keeping things in motion so that Y1 can release the knot and climb up to rejoin (again, being careful not to get crushed). Start this puzzle ( VIDEO TIMESTAMP) by lassoing the node, climbing to it, and tying a knot. This will lower a contraption on the left with two nodes that you can swing across to get over to the next area. Walk left, fall through a hatch, and you'll appear in a small area where you need to wall jump off of the right wall to get onto a lever. You can then switch to Y1, swing over to the upper platform with the objective marker, climb up with Y2, and rejoin. The pillar will move back to the right, causing the knob to rotate back to its initial position. Switch to Y1 and walk onto the lever, then switch to Y2 and start climbing upward. Switch to Y1, climb up to the top of the central structure, then switch to Y2 and push the pillar all the way left. Switch to Y2, jump over the knob, and fall down to the main level. Switch to Y1 and drop to the right of the pillar, then push it to the left (it will only move halfway), rotating the knob downward. Have Y2 climb over the pillar, then climb up to the top and stand on the lever on the right of the main stricture, locking the gears into place. Switch, then move Y2 back to the right and the pillar will move back to its original position. Y1 can then wall jump to the top of the central structure. Switch and have Y2 push the pillar all the way to the left, then switch and have Y1 climb onto the pillar. Drop off the right side, then switch and have Y1 drop to the wooden floor and move under the pillar and jump up to the "main" platform, standing on the third wooden plank away from the wall. Switch to Yarny 2, drop to the wooden floor level, move to the other side of the pillar, and wall jump on top of the pillar using the central structure as a wall.
![unravel two to the rapids unravel two to the rapids](https://i.ytimg.com/vi/EKXj56ibkqU/hqdefault.jpg)
![unravel two to the rapids unravel two to the rapids](https://cdn-ext.fanatical.com/production/product/1280x720/67e7921f-5752-4971-8f33-afd367d69aea.jpeg)
![unravel two to the rapids unravel two to the rapids](https://i.ytimg.com/vi/DWuF0pgGS7I/maxresdefault.jpg)
Split, then have Yarny 1 push the nearby upright pillar slightly to the left. I'm assuming you start the puzzle from the position in the image above (where the first objective indicator was initially). Note that there are two lower platforms- the "main" platform slightly elevated above the floor and the wooden floor at the very bottom. Here is a gif of it being completed quickly.