I used Loft and EdgeSrf, then made sure the surfaces are single span, see “rebuild multi-span surfaces where possible” in my reply above. For industrial design surface modelling, it’s a very good habit to get into single-span curves/surfaces thinking as soon as possible, as outlined in the guide, to minimise or even avoid downstream problems later.
Unfortunately, Rhino doesn’t name surfaces with their creation type automatically, so other users can’t know by just selecting them to see what surface building tool was used.
A degree 5 circle has 12 spans. A degree 5 quarter circle has 3. See below that the Loft should have 3 spans also, but Rhino refuses to build it like so, thus Rebuild. However, with 1 span, for this type of object, it may suffice, hence I rebuilt it with 1 span only.
