I am trying to complete setup of my 10' mesh. I was given it from a nice lady about 5 miles from my house. Am I correct in assuming that I should not need to adjust the Inc/dec settings? I am concerning myself with finding the ARC and making sure the new LNB is at the correct FD. My KU true south is 74. Should I use 72 for C? I am assuming that I should retract the actuator all the way and guess at my western limit and then make sure that the actuator can extend to hit my Eastern limits? Then I should peak it at 72w? All help is welcome. Thanks. I have my pic attached.