Could anyone tell me how to remove the headlight level motors from the light unit. I have a new one to replace the naff one. I have noticed L/H and R/H look different. The one on the left is in one piece, but the one on the right is 2 pieces. I can remove the top, but am left with the white spool and drive spindle. The new one I have is a one piece unit so I have to remove this...anyone got any ideas how it comes out. I have pulled it to the point I thought the whole thing was going to break away from the headlight assy!