Hi...I glued mine to lower edge of the over head cabinets between the windshield and cabinet. It works fair, but not as its full potential. Reportedly the fiberglass cap isn’t a detriment. It has been there 3 years.
But, today I am fishing cables thru the roof for changing my satellite from Direct TV to Dish. I will also fish a new XM Antenna at the same time.
order pcb