Bamboo CS300 Stylus Calibration Issue

[sheppy1]

Hi All

So total long shot here but I have a CS300 Feel stylus by Bamboo which I'm using on my SP2. All works fine and I carried out multiple Windows calibrations but still the little floating dot appears to be a few MM off from where the tip of the pen actually is when I use it while drawing in Photoshop.

Does anyone know why this is happening?

Cheers