I didn't have any trouble with my QSS8 stands, except after I assembled them, I realized that the wood bracket was attached backwards on the speaker! I think I assembled the legs of the stand to the speaker before tightening anything down.

M60s, VP150, QS8 x4 ACI Titan II sub Anthem AVM20 pre/pro Anthem PVA7 amp Panasonic DVD-RP91