Does height matter?

I have seen a few comments about getting the Skytrak at exactly the same height as the ball for accurate readings so I decided to test it.

Hypothesis
Varying the height of the Skytrak relative to the ball will alter the readings produced.

Method
Hit 10 shots with the Skytrak approximately level with the mat.
Hit 10 shots with the Skytrak approximately 30mm above the mat.
Hit 10 shots with the Skytrak approximately 30mm below the mat.

The Skytrak protective case was used.

Results and Analysis

It looks to me like there is little difference in the results with a fairly significant deviation in the height of the Skytrak (60mm high-low).