I'm going to model this digital design (because I'm not 3D printing it for reasons too long to explain here) using a water based air dry clay. When I get past the back and forth with the community until people generally like it, I'm going to take the final version and I'm going to make a silicon mold for it. Then, I'm going to use resin to do the final cap. In the future, I hope to upgrade this process but for now this is my methodology.