I got my Ground Control Pro from MAE in the 00’s, I got to see the tail end of their greatness. Not sure if you knew Ralph, the repair tech there, but he fucking butchered my JEM and permanently fucked it up when re-fretting it. Chunks missing from the fingerboard, I get that it’s ebony, but fucking fill them in after, frets weren’t crowned or leveled, he literally just installed new frets (I’ve never had to ask for a level/crown when getting a re-fret before) but the permanent damage was him taking all the tension off the truss rod and not putting it back after.
As soon as I picked it up I was disheartened, I sure as fuck wasn’t going to demand the guy who fucked up start attempting to fix it. I also assumed tension was put back on the truss rod, so when I left it in the case for about a year and didn’t touch it while I found a trustworthy tech, the truss rod nut sank into the truss rod route. If you want to adjust the rod now you need one guy pushing the body straight down on a flat surface while another guy pulls the headstock towards the floor while attempting to get the wrench around the nut with a fucking hammer. But I got a great guy here now if you’re still in the area!