Its the laws of physics that are correct Jason. If I have to be stuck in a high stand I use markers/flagging tape with my yardage pro. But I still don't like being up there for many reasons. I find the higher up I am the more bored I am and the lower I am the better for falling asleep.
Hedgie that formula tells you how long gravity affects the arrow thats all thats needed for xbow distances.
Mitch, did you put an Excal product on your Horton and did it work with no fiddling?