I bought this kit back in 1995 and flew it for 20 years on everything from G-J motors. It had a quick switch motor mount, a payload bay for an altimeter, G10 fins, piston ejection, and a hemispherical parachute. It was state of the art back then. Later I rebuilt it for dual ejection. I’m rebuilding it yet again but this time the only original part is the nosecone. This rocket flies best on fast burning motors.