Has anyone heard about an accessory that screwed on top of your scope elevation adjustment dial to quick adjust for distance? A friend told me he saw one on a coyote hunting video, but couldnt recall the brand name. Apparently, it is a quick dial to adjust your cross hairs to longer distances so the shooter could aim directly at the target and the scope would be adjusted for the distance. Anyone ever heard of such an item? With most scopes adjusting 1/4 @ 100 yds I would imagine its possible, but I cannot find anything like it on the internet. Thanks.