No need for “unroll” or any plugins. This is R7.
nesting_faces_2023Dec16a.gh (4.0 MB)
P.S. There are various ways of labeling the OpenNest parts, this is a simple hack.
nesting_faces_2023Dec16b.gh (4.0 MB)
P.P.S. The white group (below) adds the labels to the original structure. Rather than duplicate the 4 MB file (again), I deleted the big Brep from this file. You can add that back in, eh?
nesting_faces_2023Dec16c.gh (20.1 KB)
NOTE: Some of these “faces” have their surface normals flipped.