OK, I've got the sand (50 lbs in each) in the stands as everyone recommended. I came across a thread about this before but can't find it, but how are you all reinforcing the stand's connection to the speaker? The threaded pressboard-like connector seems to only keep it from tilting forward off the stand but doesn't prevent twisting or from falling any other direction. The other thread mentioned some earthquake putty. Anyone using that or any other method? Can I swap the pressboard thingy with a metal bracket? Trying to reinforce the thing from the curious little ones.