I'm sorry if this is an easy fix and I'm just not seeing it but I have 5 Jem/RG six-string guitars and from guitar to guitar the tension of the tremolo (ie, how hard it is to push down the tremolo) is different. In theory, since they are all six-string guitars strung up with the same brand of 9s and each using 3 springs in the same holes, they should have about the same amount of tension on the tremolo. One of my guitars is so bad. It's like there are 4 or 5 springs on the guitar. The only thing I could think of changing was springs but I didn't see much of a difference. Any insight into fixing this would be greatly appreciated.