James uses TWO fractal axe FX's units live (such a shame lol)
one has an emulation of a VH4
the other has a Duel rectifier
2 amp sounds to get one sound.
What i am saying is that if you really want his sound, you have to run both amps, or try that if your struggling
IVAN (Cili labs) to me has some of the best VH4/Duel Recto's for this.