Yep...I used 4 or 5 drywall anchors to mount my QS8's. It worked like a charm. They're held VERY solidly. The QS8 mounts flush to the wall, so there is little pressure pulling on the mount points.

I tried using drywall anchors to mount my M2i's with the FMB, and that was a disaster. The FMB puts the speakers about 4" out from the wall, so all the weight is really pulling down on the top anchors. They pulled right out.

So...moral of the story? Drywall anchors and flush mounting QS8's good...with FMB - bad.