This is crazy I just ran the jdm calculator and it only goes above the line of sight 7.7 moa which turns out to be 73 inches at 1000 yards. You learn something new everyday! Thank god there's people that actually like math and come up with these calculators for us. So the tallest wind flag closest (200-300 yds) would need to be 73 inches above line of sight? Maybe that's why watching the mirage on top of the target frame has always worked best for me.... The wind flags at our club are waaay to tall.