When the disc is in the middle third of the field, 1 sets a straight up mark, while 2 and 3 position to block shots forward.
As disc swings toward side, front three expand and take rounded lines to get to their positions
Eventually we end up with these positions.
As the disc swings back to the middle, we again focus on getting big and curving our approach.
As we eventually end up back in our wall
If the disc swings to the other side, we do the same thing: get big first
Before clamping down and forcing back to the middle (note: 2 is mark now)