P.S. Instead of Loft you can use Boundary Surface. P.P.S. Ah, but that fails on some cells for the same reason I mentioned - Offset Curve is messed up with short segments. Clipper PolyOffset is much better.
From the little that I know, buondry surface works only with 1 closed polyline and not 2. There are 2 because I offset them the create the thickness of the cell.
The other tool I like a lot and that I never saw elsewhere is the âPack Geometries On Gridâ. it is useful to see geometries without using a nesting tool.