A Pro Series II model, the Star Orbiter was my first rocket capable of using 29 mm motors.  I upgraded the Estes kit by adding an ejection baffle and Kevlar shock cord. 

Light-weight for its size, it flies well on 24 mm D12-5 and E12-6 motors using an available Estes engine adapter and a 48" long x 1/4" diameter launch rod.

The Star Orbiter can also be flown as a cloud piercing two-stage rocket using the Estes Pro Series II booster and an E16-0 or F15-0 motor. 

I can't wait for the next Club meeting to launch it with a 29 mm E16-6 or F15-8 motor.