They've been true one piece necks (no separate fretboard) for at least a few years now. The way you can tell is the skunk stripe at the back of the neck where the truss is put in as opposed to the truss being fitted into the neck from the top before the fretboard is glued on. RAs are the same.
FWIW I've no problems with any bullet truss in my Fenders, and/or 3 bolts...guess I've been lucky too. However I AM glad Jimmy's 5 strings are 4 bolt.
Just a note- Jimmy is aware and on top of any issues with the bullet and is looking at the whole thing as we write here. He's quite creative and dedicated to doing everything "period correct" so if there's a better way of doing it good chance he'll figure it out