A link for a video of the Y
Going by pictures I had see of this I had always assumed it was just a lateral raise with my arms in a Y shape. It wasn't until I saw the video that I had missed this part of it:
Glide your shoulder blades back and down
So with all the Y,T,W and L's you should be doing that.
"And for crying out loud. Don't go into the pain cave. I can't stress this enough. Your Totem Animal won't be in there to help you. You'll be on your own. The Pain Cave is for cowards.
Pain is your companion, don't go hide from it."