Why would you have to cut the reflector? Anybody have nightime shots of their headligh. What about if you split the headlamp apart, and lined the inside of it using this same method? Curoius to see how that would turn out.

i did take my headlight apart.... if you go with a circular angel eye it will be in the way of the edges of the reflectors (bad idea) or if you go above the inside top edge of the headlight you will have to cut the reflector (bad idea) reducing the distance your headlights will reflect...