I was building an S2A for several years, but have since sold the
project.
It is a pod/low boom, mid winged pusher.
L/D approx 35 with a folding prop.
A wonderful concept and by all reports flew beautifully. A little
complex to build though.
The Designer, Alex Strojnik has been gone for about 5 years i think.
I think his wife Cirila still sells his three books from the
classifieds. They are an excellent read!!

Cheers

Mark