No probs mate. I have had mine for just over 6 years now, and it was a very poor state when I first took it over. It lived its life in South London as an appliance delivery van (privately owned) doing very short, low revving journeys, but wasn't cared for either. Since then, I have done my best. Longer runs have helped, along with opening it up through the rev range every time I have driven it. And it has improved no end. Using proper expensive diesel, regular fuel treatments, changed injectors, glow plugs..... And not to mention a Vantuner Remap! I could go on. As far as the "sucky" noise goes - not sure. Could be noise from the turbo itself? A stethoscope test would maybe decide that? I know you said that the pipes have been changed, are they all seated correctly? Do you have a distinct lack of power? Maybe the vacuum pipe from the side of the EGR to the MAP sensor has a break? This is also common. If it makes the noise when you rev it on the spot, someone could rev it and you have a listen over the engine bay?..