i know you can change the horizontal and vertical positions on an EK. how would you aim them properly? the housings have those leveling bubbles in them. should i just screw it until the bubble is in the center?

 

You can get in a dark area and aim them on the wall. I would honestly suggest having this professionally done, as to get th best light output from them, and not blind everyone else.

 

Can any shop aim them for you?

 

at night park your car about 25 feet away from a wall. cover up one headlight and adjust the other. repeat with other light. make them both level to get the best lighting of the road. dont make them straight ahead of you they should be pointed down somewhat.