I reckon the cone version works correctly even when an offset is needed:  you shear the hulled shape afterwards instead of translating one of the end profiles in advance. BTW, everyone, my post this morning was to share a possible new technique for those interested in getting a precise design, and at the same time to improve the code suggestion I posted a few weeks ago; I realize the other technique, with a thin cube and thin cylinder hulled together, works just fine in most circumstances. Steve On 2022-12-11 8:04 p.m., 3dcase via Discuss wrote: > I do flat cylinders and flat cubes, maybe rounded for smoothness, for > ages. > Advantage is that you can affset them to wherever you want, and the > outside edge only intersects the uprights of the cylinder or square > when the offset is very extreme. In the cone version this will happen > much sooner, depending on the height.