I know you have done more fence in a year than I have in a lifetime, so I am not refuting your recommendations. However, here there is just about next to no one who will put up 2-3 strands of barbed wire above woven and no one uses the 39". I have seen more deer get themselves hung in high tensile that is 6-10 inches apart on the top wires, and I know that our cattle will put their heads between the 2 wires if they are that far apart on top. But again, that is just what we see around here. Many fence builders, will let the fence run straight across some swales rather than follow the ground closely and the deer will go under as often or more than go over; unless you are trying to make it multi-purpose for sheep/goats also. I want the taller fence with usually 1 strand barbed wire on top.