Thanks for the replys guys!

The mechanic told me about the soot buildup issue whilst he was working on it. I definately have not noticed any more smoke since he did the work. I spoke to him today and he assured me they did tune the IP for maximum power/torque, but due to the mechanical nature of my cars injection system it was impossible to have the revs vs fuel ratio exactly right all the time through the rev range and he agreed with you David that a little overfueling while the engine revs down is completely normal.

I am planning on just keeping an eye on things and seeing how it goes. There only seems to be smoke under hard acceleration, on rev down and when I first start up. All these sound normal from what has been said here.

Thanks guys

Greg