I was too tired to work much on the plane, so I read ahead in the plans a bit. Looks like the mating of the wings is coming up not too long from now. I measured the plane and the garage, then made little paper cutouts to see if I'll be able to get both wings on and keep the airplane completely inside the garage. Sadly, no – even if I arrange things diagonally it won't all quite fit. One wing will have to protrude outside instead. Darn.
Still a few things to do until I get to that point, though.