[.041 Safety Wire]

If you dont want to drop 160.00 for head tracking a system can be assembled for probably less than 60.00 using freetrack software, webcam and home made IR transmitter. I use single point tracking and find that it works quite well and adds a certain level of realism to the flight sims that support it. You can also get 6DOF with a three point system.

http://www.free-track.net/