Putting payloads into model rockets can be more complex than simply ... The payload container is a hollow tube with a 3D printed threaded adaptor attached to one end. Payload goes into the tube ...

Of the more than 350 models, 123 are 3D printing files. 3D printable models include the Moon and Mars landing sites, asteroids (such as Bennu and Vesta), craters, space probes like Cassini and Chandra ...