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can i change the tremolo on my Jackson JS20 i think it is, i just got it , cant even ID it though it looks like a JS20 ???, except the original owner said bought in 1996 black HSS. no shark inlay only Dots...still plays great 
it has a 2 on the 22 th fret, meaning (second) from the factory i guess.
it has a 2 on the 22 th fret, meaning (second) from the factory i guess.