I'm thinking a 9" wingspan with 26- 28 sq. inches of wing area.
This test glider has a 6.5" wingspan and is extremely stable. I'm amazed at how
stable it really is. After cutting rudder flaps it's still stable even in tight turns.
The nose won't drop. The guy who dreampt this design up is a genius. I don't
think the S-37 was the first.

The glider is flat hot glued to a balsa stick. Cut exactly from the plan I posted above.
0 on the canard and wing with the rear flap up 5- 7 degrees.
The dihedral is about 30 for each wing from the fuselage with some clay at the nose.
CG is about where the leading edges meet the center of the fuse.

Fleet of foamies that would make great AA conversions.