Hi All, I have an AC300 center speaker that weighs about 20 lbs. I need to mount it on the wall since my RPTV isn't strong enough to have it sit on top of the set. Has anyone used this wall mount for mounting anything, be it a center channel or TV? Just trying to get a feel for if it will do the job. At Circuit City they are all in boxes and have no display models so I can't tell if it will do the trick or not. Thanks!