Firstly, as always - excellent product - thanks!
To be honest, I could not use my MS FS 2004 setup without my TrackIR 3 Pro - its just so cool.
You must have known these questions would come, I know I would.

Over the last year, I have invested in TrackIR3 Pro & Vector Expansion. Total cost was roughly �115 ($201, todays rates). Looking at the new hardware, it sounds like a much worthy upgrade. However, its $179 (�103 UK pounds - roughly).
- Are there any upgrade paths available for us devoted owners of the past TrackIR models?
- Will the software updates be backward compatible?
- What is the support period for the older TrackIR versions?
Look forward to hearing from you.
David.