I have tried to adjust the o/side dipped beam headlight on our 53 plate Boxer but failed dismally. It's shining down onto the road about two metres in front of the MoHo. I took the h/lamp out and had a closer look and the nylon screw doesn't seem to do a lot. The head was pretty chewed up before I started. Just wondering if anyone has had this problem and did a new screw sort it or should I look for a new/second hand light unit do you think?