Captain Gare Bear

Follow-up question: So, with the boat on the trailer, could one assume that if I leveled the boat by using the trailer jack and boot stripe as likely the only thing remotely parallel to the water–and then used the plumb bob, I would be about as close as I can get to a perpendicular mount? Fortunately, I have access to a 3-D printer and some folks who know how to program the needed sizes and angles at our local Great Plains MakerSpace.,