I really like my new 4500. I'm a little foggy on the windspead, headwind, crosswind. Windspead is obviously what it says but how does it differ from head wind. I guess that if you are holding the device at 180deg. I feel the majority of the wind is coming from 120 or 4oclock. Now even thought the device isn't pointed exactly at the wind will it still give me the windspead. Head wind is the wind that is coming directly from the target or direction the device is aimed. Cross wind is any wind that is perpendicular to the direction pointed. Is this correct and is this how most of yall use the kestrel?