The best dish for multi LNB use, is a toroidal dish, as it's designed specifically for the purpose, however, multi LNB setups can be done with standard dishes.
You first need to learn the position of the satellites, so you know where you need to be pointing a dish/LNB.
D2 is a little higher and a little to the west (to the left) of C1/D3 when viewed from behind the dish.
The LNB's need to 'cross over' and be angled for both azimuth and elevation.
The diagram from beer4life illustrates this concept well.
Perhaps before attempting multi LNB's... try finding the various sats with a single LNB, that way you'll get the feel for where they are in relation to your location.
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