A fellow Big Gunner reached out to me to make a set of 3D printed Iowa cannons. ...I figured - well, why not?? 2 days later:
After life got out of my way, I’m finally able to get back to this project. I upgraded the chamber bolts on all of my cannons designs, in preparation for the more pressure needed for 1/4” Iowa bearings. Double checked with @nmmichris on space requirements. And the prototype is nearly ready for testing!