I use 5Bs in the rear. Now they're sitting inside of an open area about 9' up (there's nowhere else to put them). I have them wedged to aim down but I need to angle them down more but I'm afraid they'll topple over. I'd like to use mounts in the side wall that would allow me to move the speakers up a bit so I can angle them down securely.  I looked at the Omnimount (the 20.0 and the 20.5) online but can't tell if they'll do the job. I know Aperion sells the 20.0. I don't see a problem with the weight, but do you think they'd work for what I have planned? Hopefully the drawings will make sense, if not - let me know.

Thanks!