I live next to a south facing forest and the only spot I have for an eave mount has now grown in. I did a new site survey and the only place I have on the house is a roof mount at the roof peak. The other choice is a ground pole 160' away from the house. What would the experts here have to say? Roof or ground? Another pointing question is the azimuth. The dish pointing menu said 223° but as I have my setup, the LNB arm is more towards 200-205°. I have a Dish 500 dual. Is the menu only a rough guide?