Hurricaine joystick sensitivity?

[trumps]

a few nights back i thought i would go and fly for the dark side (RAF) anyhow the rotol version of the Hurri was my chosen mount, and i was very suprised at what a great gun platform it was, the 8x .303's absolutely shred 109s, and do a fair old job against the bombers, just wish there was more ammo!
the only fly in the ointment is that for some reason there is a noticable jump or step in the elevator controls while easing the nose up to aim at a target. none of the other aircraft exhibit this issue and are smooth and progressive in all aspects of control input, my control profile is the same for all aircaft types, so any suggestions would be appreciated guys!

Cheers
Craig