The names just get worse & worse. This trick is an elegant extension of The Two hand weave.
Start juggling Two in one hand in a rolling out pattern (throw from the inside & catch on the outside) while holding the third ball in the other hand. With the held ball you will perform a carry, which is an 'S' shape with a big circle at the end. The carry is repeated on the other side in the full pattern.
You begin a carry just as the hand doing the juggling starts to scoop to make the next throw. Carry the ball you are holding up & over in an arc from the outside to the inside over the top of your opposite arm. Turn your hand from palm up to palm down as you do so. The next throw is a two in one hand throw as normal but it is made as an Under the arm throw underneath the carrying arm. Continue the carry underneath the ball in the air as it peaks. Throw the next ball again as a two in one hand throw between the ball in the air & the carrying hand. Still with your palm facing down, scoop the carrying hand back underneath this throw & over the other hand right out to the opposite side of the pattern.
Then swing the ball all the way over to the side the ball started on, turning your hand from palm down to palm up on the way. Make a cascade throw with the juggling hand. Continue the big swing over the top of the cascade throw, then scoop underneath it & make a two in one hand throw, catch the cascade throw & go into a rolling out two in one hand juggle with the carrying hand.
As you go through a carry say to yourself, "1, 2, 3" in time with the throws made by the juggling hand. The one is the first two in one hand throw & is the ball you first carry over the top of & then underneath. The two is the second two in one hand throw which you sweep the carry under & the three is the cascade throw, which switches the pattern to the other side.
Now do the same again carrying with the other hand. Just keep practising individual carries with each hand alternately. You are probably fed up with reading this by now but I'll say it again anyway. Hold the carried ball between your thumb, fore & middle fingers & show as much of the ball to the audience as you can. Also use your wrist to smooth out any kinks in the carry, this trick really needs to just flow. Really get the single carries solid before moving on to the full pattern.
For the full pattern just start by juggling two in one hand & making a carry as before. Go straight into a carry on the opposite side by making the top half of the 'S' shape over the top of the two in one hand throw made by the carrying hand from the first carry. Begin the next carry before the previous one has finished. As one hand is scooping down at the end of the final circle the other hand is carrying a ball up & over. I find it helps to focus on the throws, I can do the carry without thinking. Juggle & count out the rhythm, "1, 2, 3, 1, 2, 3, 1, 2, 3..." Just to recap, the one is the first two in one hand throw made by the carrying hand after the final circle. The two is the second two in one hand throw & the three is the cascade throw which switches the pattern to the other side.
This trick combines very well with Orin's Multiplex.