We've spent 2 nights on it so far and got 5 of 8 speaker mounts up and all the conduit placed with no speaker wires. It seems ridiculous until you realize all the little things we needed to do like finding joists.
I ended up having to move the whole theater over 3" just to make it work with the joists.
Then, we also have an even number of joists, so both center height (CH) and center top (TS) channels needed another piece of wood.
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What really messed me up are these two
INCORRECT pictures in the manual:
As you can see, they incorrectly placed the top middle speakers either in front of or behind the listening area.
Super confusing.
After talking to dealer, looking at Dolby Atmos specs, and reading through other parts of the manual on speaker installation, I came to the conclusion that
all 3 top middle need to be pointing directly down at you from above:
Now I have to move the entire middle row 6-24" back depending on my seating area.