We have developed a distance compensating bowsite that is always on no matter how far away from the target you are. This developed as a high school science fair project and it actually works quite well. You don't even have to know how far you are away from the target - Just put the dot on the target and shoot. There are no moving parts or adjustment required. The website shows how it works www.spotonbowsite.com Let the students know what you think. We have filed for a provisional patent. We are also looking for someone to use one in an open class 3d shoot. Thanks