Sure heights would work depending on the room… certainly easier than putting them in the middle of the ceiling.

In Mojo’s case I think he has a pretty low ceiling and sits fairly far away … so you might not get enough separation vertically from the mains if on wall. (Or even forward ceiling considering his mains are something like 3 feet out from the front wall).

the problem with the dolby ATMOS setup sheets is that they have sheets for everything including two channel … which doesn’t have any surrounds at all. Have no idea what they are thinking other than marketing ATMOS for any setup.