Max distance from receiver

[gcompc]

Hello all, new to forum and about to purchase TrackIR4, need some vital information. I have a Pit and sit in front of a 42" backlighted projector screen. My head is approximately 36" away from the screen and about a foot below the top edge where the TrackIR will be mounted. All the reflectors should be visible, will this distance and angle cause a problem?

[Barred]

If it is any help I sit about 36" from my monitor and I have the camera about4" above my head and everything works fine.