Since I couldn't leave the wings in the frames they came in, I built the EAA wing slings. It doesn't look like it would take a lot of screws but there are over 200 in there because of all the gussets. That being said, this thing is as sturdy as they come and the wheels make the system very nice. I was able to put the wings in with the space for the aileron and flap area exposed, which should make it easier to assemble once those parts are made.
Based on some pictures I saw on Facebook, I am going to try to hang the rudder and the vertical stabilizer (stabiliser?) inside the frame between the wings.