I had my install done but I need to reposition the heads on the front. The rear heads are limited to the outer edge of the license plate since thats the only spot I can place them. What should the spacing be for the front sensors? I know this can vary depending on the car but as a general guideline? I have an INfinity G37s Coupe 2008. I am placing it centered (top to bottom) of the grill. I had them to the outer edge of the grill as far as they would go. The spacing between the two sensors was 22-24" (bubble to bubble). Both bubbles of course were facing the outer edges of each side. The overall install was fine, but they were not very careful to clean the surfaces of the mounting locations before attaching them with the tape. I will post pictures once everything is complete.