Micah, I've noticed that it's pretty hard to tell when the T-bracket tabs are fully engaged in the slots on the back of the QS8. I've mounted and re-mounted mine a couple times and have nearly dropped one off the wall more than once. I've taken to penciling a line above the brackets at the spot where the top of the speaker should be when properly mounted so I don't make the same mistake again.
What does that have to do with cats in space?
J/k.... sounds like a good plan to me. The most surprising thing that happened (the whole reason I told this embarassing story on here in the first place) to me was that even when I lined the tabs up with the hooks correctly and pushed down on the unit, it truely felt like it sunk down all the way into the correct position. I would have thought I'd fixed the problem and left them up there to topple off of their bracket again had I not double checked with a flashlight. And when I did so, that's when I noticed that it was just barely hanging on to the hook!
I didn't have that problem with the left QS8. So I don't know if this was just a fluke or not. I just figured I'd share my blunder so that perhaps someone else out there might find their mistake as well before catastrophy (cat... get it) strikes them as well.
If so, then I'm glad I could help.