You could still use the FMBs with Molly bolts to hold the brackets onto the wall, 2 of them should easily hold an M22. If this still doesn't work for you I would just use the M22s on their sides till the kids are old enough to not worry about the speakers falling onto their heads; At this point you then have to worry about the kids falling onto the speakers.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70