I don't see a problem in Cura. Your pattern sticks out too far creating overhangs though, which will result in holes on vertical surfaces.

Thanks everyone for your help. Phiro, re Vase mode: I've created some complex surface patterns using other methods, and although these have made the object difficult to shell, vase mode in S3D has handled it well. I'll use all these thoughts to make something more interesting, and see how I go :)