Took my 5 on Wednesday to the main man. To finally turn my boost up and check for det. Do any last additions to fueling. So the engine was making very healthy power. We got it upto 21+ psi and the turbo let go. Absolutely gutted. But at least i know the engine has the capabilitys of 220-230 horses easily. Thanks to Chris/scoff. Wasted a few hours of his time in the end. Oh well onwards and upwards!