The entire fuselage weighs about 150 lbs with hardware and tail assembly. Max gross weight for the fuselage will be around 2400 lbs. That's a very good strength to weight ratio. The actual design gross weight will be 1200 Lbs for the entire aircraft.
The design load will be +6 and -4 G's
After the plywood fuselage has been assembled you cut 1/2" foam to fill the cutouts, add foam to make the outside contours and cover with 0.013 Aluminum.
In a couple of months you can be sitting in a complete fuselage making airplane noises.