Dave Richardson has a plan for a Waco UPF-7. It has a span of 86 1/2" and a projected weight of 23 pounds. No engine is shown but I would go for something like a small Kawasaki or maybe even a Sachs Dolmer, and get the power without the weight. It isn't shown on the plan but total wing area is 2193.75 square inches, which figures out to a wing loading of slightly over 24 ounces per square foot, which isn't at all bad!

Fuselage is box construction, with 1/8" sheet balsa sides with formers glued on. Empennage is built up of balsa. Tailwheel shown on the plan is a CB mounted ahead of the rudder, with springs going back to the rudder... Different!! The scale drawing with this plan shows the tail wheel actuated internally. Engine is mounted on the firewall which is mounted on large dowel stand-offs, which are bolted to the firewall. Landing gear again is solid pieces of wire wrapped and soldered together. The only shock is in the tires and the spreading of the gear. Cabana struts are quarter inch arrow shafts filled with dowel and strapped to pine or spruce blocks in the fuselage. Top wing is held to the fuselage by sheet metal screws. Wings are conventional construction, except for the use of two arrow shafts for main spars and eighth by quarter spruce secondary spars, tips are built up. The plans come on three sheets and looks like it would build into a nice airplane. With the wing loading on the low side, it should fly very scale like with a Quadra installed.