Hi @gamerster120 Stoked you finally got the SKY in hand, thanks for waiting so long. On initial setup, SKY goes through automated calibration routines on the sonic sensors. It needs to receive wind from the four cardinal directions to ensure the frequency timing of the sonic waves are consistently measured and in tune. More details here: SKY / Tempest: wind sensor initial self balancing
And, once your wind sensor tunes itself…it’s certainly possible to read 0mph – when there is no breeze at all! 
A sonic is far more accurate in measuring instantaneous wind compared to a traditional propeller which has to deal with momentum & inertia.
As far as mounting options…you’re in really good hands with the many friendly station owners like @peter on this thread.