A small tip: Recently I added a small clear "lens" shape cabinet door bumper to the lowest projection of the TrackIR Pro Clip. This causes the IR LED to be see at greater angles than normal. Up until that modification I had trouble looking down and to the left as the recessed IR LED would stop being seen by the TrackIR camera. The clear plastic adhesive extension applied on top of the IR scatters the light through a wider arc and now I can look down-left with confidence.
