Nope the boost is not spiking and then dropping back...
With a short hose from the FMIC piping to the actuator (no controller), the boost sits on 5psi till about 4500rpm, and then rises, and rises, and rises, to 12psi+...
But it's not an actuator problem... This happens with the actuator disabled and the wastegate wired open...
Thanks for the advice...