I am planning to purchase a fta 2700a series pansatt reciever soon ,I have put up ,my dish on the roof with a great line of site ,Just wondering for the actuall dish azimuth adjustment dial ,Should the line be alligned to 30 or 32 .(Up and down setting) .Also can I use the originall LNB from dtv and just buy one more ,and buy a bracket to get 110 and 119 signal....thanks