I agree with EB on your most southern sat and your outer edge sats. Don't expect perfection on all 3 but a happy middle ground where signal quality is good. Seeing that my arc is from 11-127w, I use Amc6 at 72w as my southern sat and Intelsat 805 at 55w as my eastern sat(I don't like fine tuning with circular sats) and finally Galaxy 23 at 121w for my western side. Once those are scanned in well, all other sats should fall in place.