Thought I read in a guide that vision and confidence are a part of the check on the line between WR and CB in regards to initial jump on the line prior to the snap. Experimented with using these in one of the primaries. Has anyone else heard about Con and Vis used like this? My thinking is that if the WR can always get the jump on the line, separation is improved and speed will take over where catching and carrying aren't as high a priority.