As you can tell from the sat numbers, 110 and 119 are 9 degrees apart, which the 500 is designed for. If you try to point to the 119 and 129 (10 degrees apart) you are going to get low signal
Both the skew and elevation will be off. The skew probably won't be a problem, but the elevation is going to be about 4.5 degrees high. The change in azimuth is about 9.3 degrees west.Well as far as I know you can use the receiver to tell you skew and elevation, set it to that, then move the dish 10 degrees west.
I think this would also allow you to use a DPP Twin to possibly avoid using an external switch. I don't think the DPP Twin will work correctly if it isn't seeing 110W.Why dont you point the 500 you want for 119/129 to 110/119, and swing the other over to just the 129, just a thought.
Well if he points the 500 at 110/119 and the wing dish at 61.5 he won't have all the HD channels.