Guillermo sent in his swing with the main complaint of losing his posture and early extending, causing a severe loss of power and shanking. What I saw right away was Guillermo’s hips turning to start the backswing instead of starting with the upper trunk, along with him keeping the clubface extremely closed in the backswing, which completely robbed him of any semblance of wrist cock. Since Guillermo turns his hips so early they are pretty much done by the time he gets to P3, and with his wrists unable to cock at all he finishes his backswing by bending both elbows and pulling his left shoulder behind him, which in turn initiates his downswing by leaning his upper body toward the target. With all this going on it is almost inevitable that he will lose the tilt in his pelvis in transition and drive his legs out from under him. I believe that if he can start his swing by turning his upper trunk and have that pull his hips into play, while at the same time maintaining the cup in his right wrist (he is left handed) and gaining some vertical wrist cock earlier in the backswing, that he can totally change his pattern for the better.