Hello, New to the forum. I recently purchased a 2013 Power Wagon out of California. Truck is currently in route to Bellingham Wa for the ferry trip to Ak. Buddy sent pictures and in one of them, there appears to be tracks or channels running parallel to the factory black roof channels. They look like Rhino-rack RTC type. (I can’t load pics right now but will). I don’t have any experience with these type of racks but do have lots of experience with leaks in one of the wettest places on the planet. As soon as truck arrives I plan to pull and inspect. Pics appear to show screws in the tracks. I searched up Rhino-racks and see where they are primarily use on canopies or toppers. Anyone seen them effectively installed on a cab roof and not leak and turn the cab into a terrarium? I would not intend to ever use these racks, just can’t have them leak. Short of ample amounts of 3M 5200, does anyone have any experience or recommendations sealing holes drilled through a roof? This really bums me out, as the truck is very clean for a 2013. Thanks in advance!