29mm Motor Retainer
Both the 24mm and 29mm motor retainers have the same mounting hole arrangement which allows both retainers to be used interchangeably on the same rocket - i.e. use the 29mm retainer when using 29mm motors, use a 24/29 motor adapter and 24mm retainer when using 24mm motors.
Threaded inserts allow retainer to be added after model is built.
Note: This retainer requires a rocket with an aft centering ring to mount the threaded inserts. The body tube should be at least 1.9" ID to clear the retainer.