Multi monitor setup needs custom FOV

[SKUD]

I have been playing around for hours trying to get the FOV right on a 3-monitor setup. The default 70 degree is way too far back and causes massive distortion on view out L&R monitors. The 30 deg is way too close to the panel but has little distortion. Is their any way to set a custom FOV like 50 degrees or something like that? I've tried using the set and hold FOV key but my TrackIR just pitches the setting the moment I move my head.
Any other tips on mulit-monitor set up would be greatly appreciated.
Thanks,
SKUD