First moving the came forward and backward. 6.8 seems to be the lowest we go. Any lower and you started seeing the back of the chair or even went to outside the cab. I did see a piece of chair floating if you turn right, so I may have to bump this up to 6.9
FOV 35, Z-Axis 6.8

FOV 40, Z-Axis 6.8

FOV 45, Z-Axis 6.8

Then we played with moving the camera to the left
FOV 40, Z-Axis 6.8, X Axis .95 moving camera to the left

FOV 40, Z-Axis 6.8, X Axis .90 moving camera little more to the left


Usable now....
I vote for 6.8 and 0.95...