I have been reloading for a few years now. 3d printing for about 6mo and learning CAD. I was wondering if anyone on this board had any experience with 3d printing a mold in plastic, and then using a Lost PLA method to cast it in aluminum using greensand. I would like to try a roundball mold in the near future and just thought I would look for advice or tips if any have done it before me. Thanks in advance for any advice or leads on resources.