... Also I read somewhere that guide data comes from the 119 sat. If the installer chose to use the 3lnb dish which sat does the guide data come down from?
Guide data is actually streamed from both 101 and 119 simultaneously, but SWiM installs only use the main 101 stream. The 119 mirror is used for non-SWiM legacy installs so receivers can access guide info. while tuned to the 110 (unused), 119, or 103 satellites.
Note: The non-SWiM SL-3 LNB always uses 101 for guide data as well even when tuned to a satellite at 103.
... Looks like all your locals are on 101 and the HD sats, so all you will lose is a couple sonic tap channels.
Well its more than just "a couple" I'm afraid.
At last count I think it was more like 30 Sonic Tap channels are on 119.
EDIT: Yes, 30 confirmed from another post:
SONIC 807 SonicTap: Rat Pack
SONIC 815 SonicTap: Holidays & Happenings
SONIC 824 SonicTap: Groove Lounge
SONIC 852 SonicTap: Jazz
SONIC 853 SonicTap: Metro Blend
SONIC 855 SonicTap: Great Standards
SONIC 861 SonicTap: PUMP!
SONIC 865 SonicTap: Piano
SONIC 870 SonicTap: Fiesta Tropical
SONIC 873 SonicTap: Regional Mexican
SONIC 876 SonicTap: Mariachi
SONIC 877 SonicTap: Carnaval Brasileiro
SONIC 880 SonicTap: Familiar Favorites
SONIC 881 SonicTap: Italian Bistro Blend
SONIC 882 SonicTap: Italian Contemporary
SONIC 883 SonicTap: Irish
SONIC 884 SonicTap: Tranquility
SONIC 9560 SonicTap: Tranquility 9560
SONIC 9561 SonicTap: Rat Pack 9561
SONIC 9562 SonicTap: Great Standards 9562
SONIC 9563 SonicTap: Groove Lounge 9563
SONIC 9564 SonicTap: Familiar Fav. 9564
SONIC 9565 SonicTap: Irish 9565
SONIC 9566 SonicTap: PUMP! 9566
SONIC 9567 SonicTap: Holidays 9567
SONIC 9568 SonicTap: Metro Blend 9568
SONIC 9569 SonicTap: Italian Bistro 9569
SONIC 9572 SonicTap: Jazz 9572
SONIC 9573 SonicTap: Italian Contemp 9573
SONIC 9574 SonicTap: Piano 9574