RE: Turning without a rudder (Space Scooter)
The Space Scooter has differential built into the aileron setup. This differential assists in reducing any yaw effect from not having a rudder to help in turns. My Scooter turns just fine without elevator use, but using the elevator certainly will not hurt.
The Space Scooter was my second plane, I still have it and really enjoy flying it. I installed a rudder after flying without one for sometime. Enjoy the plane it is a great aileron trainer.
Danny