Groove the wall pass, the return into the path rather than the feet, and the timing of running past the man you just passed to.
Same Y as the base pattern: base, pivot at the fork, one player on each arm, roughly 15m between stations. The ball starts at the base. Pass into the pivot and immediately run past him on the outside. The pivot does not turn and does not control it: he plays it first time into the space ahead of the runner. The runner takes it on the move and releases the next arm, which repeats the wall pass off the same pivot. After both arms have worked, a long ball returns the ball to the base and the lap restarts. Rotate the pivot every two minutes: it is the hardest job.
The difference between a set and a wall pass is one detail: where the ball goes back to. A set returns to the feet of the player who passed it, and he is standing still when it arrives. A wall pass returns into the space beside the pivot, and the passer is already running into that space. The first keeps possession. The second beats a man.
That is the whole point of running this variation after the base Y. Players who have learned the pattern know the passing sequence, so the sequence stops being the difficulty and the detail becomes the difficulty. The pivot has to resist the urge to turn, which is the most common failure, because turning feels productive and it wastes the run that is already happening behind him.
Weight is unforgiving here. Too heavy and the runner chases it out of the grid. Too soft and the pivot has effectively played a pass into a defender's feet, which in a match is a turnover in the middle of the pitch. The target is a ball that arrives at the runner's stride without asking him to change speed.
The run itself is the part that transfers most directly to a match. In the grid, the passer runs past the pivot because the pattern says so. In a game, he runs past because the defender's weight has shifted onto the pass. Coaching the grid version well means insisting the run starts as the ball leaves the foot, so the habit exists before the defender does.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.