Looking into this a bit further I don’t think that the Mountune map is suitable with this Actuator.
Quote from another forum with the same problem
“Your stock program (or MR375) will probably not be able to handle this new type of spring resulting in overboost (same thing I have with the CP actuator, now on CP370 it’s OK when you go WOT but when you’re crusing and floor it then it’ll overboost for a sec on stock settings because the ECU is not expecting the spring to react this way). Best check that with Mountune though!!