According to "The List" (see main SatGuys page), Indy locals in HD are on the 129 sat and SD Locals are on the 110 sat. Much of the National HD content on the Western Arc (110, 119, 129) is on 129. It is likely that your installer put you on the Eastern Arc (61.5, 72.7, 77.0) because of the line of sight problem you have with your neighbors tree. It is possible that the tree is blocking more than one of the satellites and in particlular the satellite at 129. Since you can receive your locals OTA he did the safe thing and set you up on the Eastern Arc where most of the National HD channels are relayed from the 72.7 sat.