@Coldcomfort - Get a remap/postal (mild tune_20-22psi boost, AFR 20-22:1). Turns EGR off, think you are running positive pressure actuator need to rework that for higher boost.
Contact Harley Anderson:
https://performancetech.com.au/ecu-remapping-3/
Approx $790 posted, send him your ECU (2 week turnaround)
(formerly ECPT Tuggerah, NSW)