x40 PT limit settings

[LHFARM]

Have "re-certified" X40.  I'd like the pan to start behind the camera (the mounting bracket).  If the pan could be represented as a clock face, I'd like the pan to start/stop at 6 o'clock.  Mine starts/stops at 10 o'clock.  Likewise, the tilt is less than horizontal at the top.  Are there adjustments for the PT limits?
Thanks,
Barry