Cool small world, yeah if it's turning easy I dont think your have any issues. Since it seems like you haven't tried it before slow is the way to go. Plus it lets the wood adjust better. Some time I'll get it straight and a day later it's back bowed. So just keep a close eye. Also don't be afraid of the first turn it will probably make a little noise.
Got the bass home and had a chance to tweak on it a bit. The nut on the truss rod was all but wobbling free, had to give it at least a full turn just to encounter any resistance at all. Kept going until I felt a normal amount of resistance, the neck is already about 50% there, so it's looking good. I'm very comfortable with standard truss rod adjustments, I'd just never brought a bowed neck back from that far gone before. All the electronics check out. It's strange; the white finish is already noticeably fading to yellow, the metal hardware all has a thick matte layer of dust and grime on it, the bottom of the body has the usual minor finish chips… but the plastic is still on the pickguard!! this thing really was bought new, probably hauled around from residence to residence without a proper case, but almost never played. I'll fix that.