We’ve recieved all of the coupling rings and assemblies from our manufacturing sponsor, Cambridge Precision. There are 3 copies of the bulkheads that hold together the motor sections and parachute sections of each stage.
There are also 3 copies of the coupling rings that hold the front of one rocket stage to the back of another. They are restrained by M6 nylon bolts that are sheared in flight for the rocket stages to separate.
Here are the rings for the 3 stages, laid out in order whilst being checked for alignment.
Thanks a lot to all the guys at Cambridge Precision who made these parts for us, and Chris who finished them off for us.