Today, I designed and built a couple of stands that will support the fuselage at floor level, which will allow me to crawl inside to do the remainder of the work in the rear fuselage.
The forward stand is nothing more than a couple of 2x4s, some 10"-long sections of 4x4s, and some 6" scraps of 2x4. The 6" scraps were screwed on to make narrow channels for the false, wooden spar to sit in.
The tail support will be a customized, 17-3/4" tall sawhorse. I'll rest the tailwheel spring tube in a padded notch in the sawhorse. (Tomorrow, I'll try to mount the tailwheel tube to the airplane.)
I also built a wooden floor for the inside of the fuselage out of 3/4" oak. I'll need to make another one for the fuselage bay aft of this one, but because I haven't been able to crawl in there and measure it, I don't know the dimensions of it yet.
After all the woodwork was done for the day, I installed the aft floorboards in the airplane. This will allow me get in and out without damaging anything.