height adjuster motor on stagea series 2 xenon

[oxford1327]

am looking for info or pictures on the drive mechanism for the height adjusters on the sides of the xenon headlights, specifically if they are on a single keyway type arrangement or a spline type that can be skipped a tooth.

reason being one side of mine is adjusted as far as possible in the downward position on the screw and is still looking for possums in the trees, and if i go any further it jams and makes the motor to raise/lower activate.

kinda wanted to see if anybody had pics of one apart without the need to pull mine to bits first