Have done a few more km's now and the exhaust has mellowed. The boomy noise that I was experiencing has gone. Went for a drive with my family last week and they did not even notice the difference. On the other hand my neighbour who is into cars commented on how good the car sounded.

From a driving perspective all hesitation and turbo lag as such is gone and under acceleration the car pulls cleanly and I am happy with the result. Gave the car a bit of stick today and I can only describe the sound as glorious.

Once again I note that with the revised version I have not yet experienced any droning under normal driving conditions. I have taken some video and will post it up in the next week.