A classifier gets set up and you can spot that it's not per the diagram with the naked eye, do you throw it out?   18-01 got set up at my local club. The two boxes are supposed to be 7.5' on each side of the centerline of the stage. When standing in the left box, you're basically in a straight line with the most left target. The right box does not fall out mirrored. It fell between the last and secound to last. It was obvious they were not mirror images by at least a couple of feet.