Guys for future people adding the sharkfin. If this was already mentioned then feel free to delete. I brought my truck home in the rain. When in the garage I took the mast off and pressed down on the base and notice water coming out of the weep hole towards the rear of the base. I kept pushing and using a paper towel to absorb all that I can before installing the fin. Make sure you get all the water out so moisture is not trapped in there before sealing the fin to your truck.
2011 Overland summit ordered 1/19/11