Due to the strength of the carbon fiber spar caps, it turns out there's no need for struts. An 80 mm diameter, 2mm thick carbon tube above the pilot's head transmits all of the forces from the wing. 

Note also the electric propulsion is swapped for a 3W 275 two-cylinder 2 stroke because it's much lighter & also because the best electric options were all multi-motor (we even looked into a 6 motor system, 3 pods per wing) and it's not clear whether an ultralight is legal in France with multiple motors.  

Inspiration for the wing is from two sources: Colomban Cri Cri for the high lift profile, and Hurel Dubois for the high aspect ratio on a normal aircraft (not a glider and not high altitude like the U2). 

Evolution with Faired Pilot and Electric Propulsion (2x 5KW motor/battery pods)

 

Variant for lower drag: lower seating and a fin extension to the boom

Fuselage in 2 halves held together by the composite leaf main gear. Seat is a cloth cradle between the two sides

another version

The Center of Gravity is too far back in this picture, I need to move the wing & struts a bit further back to compensate. There is no longer any tube coming down from the engine because the carbon tube should be strong enough without any support. The pilot would be wearing an aero-helmet. 

Smaller Wheel, Different Tail