I started this project about a year ago- a Grand Bombard for the Turnip28 game. The cannon model is a design available from the Turnip28 Patreon. The crew is largely based on the Eureka 'Sandras' with a few other things added in.
I needed cannonballs for it, and got the mad idea to create some Madballs- weird toy foam balls from the 1980s. As far as I could tell, there wasn't an STL of them. I never actually owned any, but I do have a comic book featuring them! The spheres were actually my first major 3D designs, but oddly I ended up releasing a couple others before I got around to finalizing the 'Crazy 80s Spheres'.
I also designed some pulleys and a 'crane clamp' for gripping the spheres. I found a nice treadwheel crane by Printable Scenery that seemed to fit the vibe I was going for really well, because these things would be big and heavy!
All in all, I'm pretty happy with how it turned out, but I think it would need several more crew!
Additional images of a game:
