That's just it , I don't want to have to think about all that when it's hammer time. Whan I practice , I am always aiming for the exit hole on the opposite side front shoulder and once I know the yardage , I adjust the slider ( ground shooting) and aim for that spot. The only time I have to mentally compensate is for close range like 10 or 12 yards. I shot my last Black bear at 12 yards from a ground blind and had to tell myself to hold low . From the treestand I hit exactly where I aim , no thinking about it. Here is my set up.