How do I stop the first shot from happening? The first shot is happening 1/2 way into the initial purge down the left side. The purge line starts at the bottom left of the bed (in the picture where the X and Y 0,0 is) and travels to the top left, moves to center takes the snap shot, then goes back to the top left and continues the purge to the bottom left. It is pulling some crud with it and leaving a small mess in the center. Below is the plan, and that spot is the end of the Y movement on the purge line. I don't really need a blank canvas shot, or if I do, can't it take it after the purge line and before any adhesion type?