Nice shredstick!
The S540FM was my first 'expensive' guitar. And after doing a few pickup swaps, once the QM1 and 2 really grew stale on me, I finally settled on the ToneZone bridge as well. Super D was too much and Evo was too bright and direct in the end. Air Norton neck was magic from the get-go, after taking out a PAF Pro neck. Middle is an FS-1.
Still contemplating to upgrade the trem block for a big brass block.