Still got a 25 on. The gizzmo records the last highest stable pressure achieved so maybe I should do pulls up to around 4k ish and see if it can get 15psi there and accept that it does drop off further up. Doesn't bother me at all though I understand it can't flow that much air at the top end. Would've thought you should be able to get 15psi at some point in the rev range as that's what the chip spec states. Could just be the way the controller is designed, it doesn't want to have the boost any higher as it isn't stable enough.