I'm also currently running on the small AEM nozzle, not the medium.
Progessive AEM controller coming in at 7psi and rising to full pump at 15psi. doesn't boost much more than 16psi at all currently.
WIll let you know how IAT's fare when the new engine is in soon, should be around 340bhp at 20-21psi, so may have to go up to the medium nozzle