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No, you don't need to aim any differently. Some say that you need to aim lower because of the difference in trajectory and yada yada yada.....Form is the most critical component, especially from an elevated position. The tendancy is for people to lower their bow arm to get on target instead of keeping their uppy body square and bending at the waist. By lowering your bow arm you will hit high. Bend at the waist and you'll be spot on!