On the electrical adjustment Sei lights you can adjust the height with the IIRC 5mm Allen fitment on top of motor once you look for it you will wonder why you ever missed it. You are correct both lamps should be same height though there is sure fire way of making sure they are spot on. Come MOT time they should be checked with correct alignment equipment and most will adjust so they are correct for nothing.
-D I have nothing to hide... I think the local MOT station is bent on of my headlights wasnt pointing in the correct direction ie stright down on dipped beam and it passed. My Dad noticed it and a few adjustments the beam is now at the correct level. To correct the beam you need to remove the motor get a bolt spanner and turn the nut at the top to screw the pin down. [o)] Now I just need a new Sporting