Re: Jackson Fusion XL trem problem
What year was this Fusion? The first couple years of the Jackson Professional series came with Schallers, 1992 and 1993. The JT-590 is a Schaller. The JT-580 is a TRS, which starting coming on the imports in 1994.
If it was originally routed for a Schaller, then a Schaller should fit right in. The Schaller saddle screws are too thick to fit into an OFR.
I would put a Schaller trem on it. Either sell off your OFR or trade it to fund this. You can also find Schallers on **** in the $50-$75 range. Beware, though, that the older Schaller baseplates often strip out at the intonation screws. Schaller rectified this a few years ago, and they will sell you a new baseplate for $20 I believe.