Try removing and streching the spring on it a little bit. Thats prob whats rattling.
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life for its own carnal pleasure. Bass: Jackson JS3. Guitars: BC Rich IT Warlock & BC Rich masterpeice Mockingbird shortscale. Zoom club#2. BC Rich club#26.
I have the same problem with my Tobias Killer B, I found that the saddle height screws vibrate loose on occasion and when they do it rattles like crazy. Just adjust the height of the saddle so that both screws are touching evenly against the bridge.