Karthik,nnThank you for your response. To clarify I have an O-grid (Semisphere) and this is the 'Front Plane'. The reason I want to have the grid flush with the symmetry plane is so that I can peform a farfield analysis here, likewise why I'm stretching my overset quite far downstream. Can you tell me what's going on so that I cannot have the overset lying flush on the symmetry plane? I suppose a possibility would be to instead mirror the wing on the other side of the symmetry plane, though not ideal for computational processing.nThanks,nPiercen