The freedom of movement was bugged, so that you could't get the same rear views in some plane as with conventional hat or keyboard view. This effect was most noticeable in F4U's. (See bug report http://bbs.hitechcreations.com/smf/index.php/topic,232289.0.html )New version fixed that.
Cool. I've always had a problems looking back in the Corsair.
For comparison:(Image removed from quote.)Old TrackIr View(Image removed from quote.)New TrackIr View