I don't know guys, If the edges all around the end of this shape coplanar, you should just select them and do a regular offset without any further hassle and plugins. [image: au9U_Offset.jpg] Now if they are non-planar, make an intersection with a flat face and do it afterwards. Another way would be to fill in that face first (just redraw a segment on the perimeter - again, only if the end edges are coplanar) and then do the offset. [image: oo8v_Offset2.jpg]