What's everyone's favorite cost effective method for drive destruction? I have hundreds of drives that have secured data on them that I need to wipe/destroy. Got a quote from a shredding company for 5 bucks a drive...which I'm not doing. I don't need certified destruction, I just need to damage the drives enough to be confident that they won't be recoverable ( absent extraordinary means ). I was thinking a big tub and lots of an acid...but I really have no idea. Which is why I'm here. So...ideas?