The center LNB will be located where the current LNB is. That's a given.
And the trick posted above, should help you get there.
Feel free to still move the LNB toward/away from the dish as much as 1/2 or 3/4 inch to fine tune, as that may help, but you should be pretty close.
As for the side-mounted LNBs, they should probably be about the same distance from the center of the dish as the central LNB.
So, that means as they get farther out, they need to be moved a bit closer, and tipped toward the center of the dish.
A way to visualize this, is to tape a string to the middle of the dish, and put a mark on it where it touches the central LNB.
Now, move the string sideways, and it should touch the face of the side LNBs.
IF your central LNB is aimed at your True South satellite, then the side LNBs will be about equally high.
If you aim well east or west of your True South satellite, then the side LNBs will be one higher and one lower than the central LNB.
(Unless you have an elliptical dish and can skew it)
The more I write, the more I realize this is just confusing.
Don't we have a simplified guide to multiple LNBs around here somewhere?
There are many threads where members have described the job.
If you read enough of 'em, you'll absorb any secrets. -
If you want the math on where to locate the LNBs...
MJflash and his math to put two LNBs on a single dish:
http://www.satelliteguys.us/free-air-fta-discussion/89049-offset-lnbs-theory-practice.html
If you just want to see a good example of someone mounting two LNBs...
Linuxman and dual Sky Mexico LNBs on 87 / 97
http://www.satelliteguys.us/free-air-fta-discussion/99108-87w-97w-primestar-84e-multi-lnbf.html
See the pictures of this thread (too long to read) and you'll see where the LNBs would locate in space, if you had a whole bunch to mount...
Linuxman and entire arc on 6' Prodelin:
http://www.satelliteguys.us/free-ai...st-way-receive-whole-ku-arc-fixed-dishes.html