Hi All,

Thanks for speedy replies - the shape is created by using planar surfs so I create the outlines fill in with planar - join the surfaces together apply radius on edge then shell - must be something in between the application of radius or shelling - I will check out further but strange it happens differently in locations as the base outline is the same all the way - a continuous polyline. I dont use flow as using this method I know the parts unfold no problem.