Yeah I'm not surprised, it's such an easy system. On the yards thing...It's interesting as I use metres for distance but when I call wind I use mph not kph. Is that weird? It's how I learned, (mph) and whilst I know the conversion I never do it. I'll call it then input that to StrelokPro in mph and it does the calculation as usual. It's set with a mix of metric and imperial measurements. A bit weird, but it works.