A plane with two stages. In case of an emergency, this plane can separate in two save the pilot. Staging after that will attempt to slow down the jet by using parachutes and Sepratrons (normally used to separate stages). The top boosters can also be used as a dumb missile if you wish.
WARNING: If you attempt to modify this plane, select the first tanks after the Bi-coupler and press R to reset Symmetry type. It keeps resetting anything after it to Radial instead of Mirror symmetry.