Extruding scaled mesh

I’m using the unity procedural example to extrude a mesh. This works fine, but the extrusion script doesn’t seem to take the scale of the initial mesh into account. So the extruded mesh doesn’t have the right trail/form.

In my case I’m changing the mesh scale as it moves along its path and would like the extrusion to be thicker/thinner too.

Does anybody know why the scale is ignored or how i could accomplish this?

ahh, I just needed to untick “Auto Calculate Orientation”… so simple.