This might qualify...

View attachment 90462

three lifting surface is always an option..

Some of topic. (i got an tailwind virus, third day feel sick) Kind of taliwind in ul class. (450 mtow / 250 empty 65 km/h stall)

Nesmith cougar was build lighter to tailwing, to have ok. landing speed without flaps..

https://en.wikipedia.org/wiki/Nesmith_Cougar
567 kg kg mtow / 283 kg empty with 0-235 (108 kg dry)

The question - If 0-235 substituted by rotax-912 (60 kg dry 48 kg minus ? ) - makes empty weight of 235 kg ? And less fuel / tank - mtow limited to anyway 450kg. And new stall speed is equal to - 85* sqrroot(450/567) = 75.7 km/h. Flaps on Tailwind lowers stall speed from 63mph to 55mph - So in conservative approach - 66.08 km/h with flaps if we assume same CL increase. So add some anti-graviti stripes - and we are at 65 km/h

And - back to topic - with so lightened engine, fuel tank in wings and tricycle gear and with 4309/0006 airfoil - it will place spar after pilot seat.

Hard question - How our max speed will suffer ? sqrroot(450/567) ?

Small problems - here is stated Original tailwind (looks like w10 version) with 55 mph stall at 1300 lbs gw

So - do math com true or not ?