I am trying to create a loft feature between 20 sketch profiles spaced equally apart (0.2m). I have them within an assembly because the profiles' locations relative to their own part is important (see below). Each part is a sketch created with a few APIs (see Using a Macro to connect the dots with a spline), where each sketch is a point cloud of various grain profiles.
As far as I know, I am unable to actually create a loft feature in an assembly, as the loft tool is specific to the feature toolbar within a part. Is there any way around this issue? I've tried saving the assembly as a part, but the created part is totally empty. The profiles I'm currently interested in are shown below.