Hi Steve,

Before I did as you suggested in your previous post I took the model into Rhino and shaded it, if you look you
can see a bad crease on the end.

This method of further splitting the curves is an excellent idea !! Thanks

There is one small area which still doesn't look quite right and im not sure how that could be resolved. Looking
at the profile of the surface you can see that the iso curves don't quite make it to the end of line and it is this gap
to the arc where the deviation is taking place.....this would also be a pain to machine in the area.

If you have any further ideas I would like to hear them. :-)

TIA