Here's a photo of my jerry rigg magetized xm radio resevoir steel plate mount (platform). It just a steel plate cut to the same circumference as the Garmin xm radio antenna.. The xm antenna is mounted with a magnet from the factory which holds itself onto the steel plate that bolted to the topside of the resevoir using the stock res bolt.
Later on down the line I plan on redoing the steel plate and making it a rectangle shape comparable to the resevoir top, rather than a round shape currently being used.
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