.... Step 26. Install the radio so the center of gravity (C.G.) is between 7.5 and 8.25 inches aft of the nose of the glider. The C.G. must be within this range for the model to be flyable. You can check the balance by placing the wing on your finger tips with one finger on each side of the landing skid.... My old manual was lying in a pile of junk. It was dated 1988! My first sailplane! It really handles much nicer when you put winglets on it. Definitely a good mod. Have fun John Asplund AeroMech San Luis Obispo, CA RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]