I have a g2622t that I bought a few years back. I've made the following mods:-
grover locking tuners, chrome G knobs, bigsby tremolo, treble bleed mod on lower horn vol pot, strap locks, graphtech resomax bridge, graphtech nut, seymour duncan psyclone hot pickups (filtertron style) with 2 connection pin quick change clips
To be honest it was great before any changes but Im a perpetual tinkerer