Is the glass at all structural, or does the steel tubing extend to the
tail?

Bertie

I think all the way to the tail. Met a glastar rep on the ramp once.
He gave me their promo DVD for the Sportsman. II found the plane very
appealing because it was about a hour (2 max) of work to go from trike
to tail dragger with two people. The DVD shows the operation -- it is
really cleverly engineered.

It's a pretty fast bugger, too, for being able to land all over the
place. Tundra tires!

Does cost a lot though. Another dream not happening