If you compare the Brasilia and Dasher, look at the body side creases, hood front corners and side window openings. The bobbed tail and headlights are the major differences. Agreed the Dasher looks like an un-sectioned Sirocco. All in the family.
I've got a set of fiberglass fender skirts, but they won't fit the Superbeetle because the clamping mechanics interferes with the axle end.
Do you know what class the X-11 was running in? Because if it's the 36hp challenge, the parachute is funny.
A few from my albums:
