Hi All. Was getting a Magic Trackpad next week, and saw on trademe ( new zealand style ebay) some Galaskins. URL: http://www.trademe.co.nz/Browse/Sea...arch_keypresses=10&generalSearch_suggested=14 . Question is , do these affect the tracking performance?? They say they dont, but putting a sticker over a touch sensitive surface is bound to dull the effect isnt it??