In C 1.1, I create a new spline object, draw an oval cross-section, then set the method as translation (or pipeline, same end result) and the envelope as free.

Then I select one envelope: the upper one when viewing from the left. When I try to import an Illustrator file (filename.ai) as an envelope, it draws the file on both the upper and lower envelope, and resets the envelope to symmetrical.

Is there some trick to importing Illustrator files to make free (asymmetrical) envelopes?