So the mold will be 3d printed using PETG plastic, which might take the abuse of being a forming buck for the radiused holes. That you could then tack into a housing. You would need to go slow. Pretty sure I will make the housing mold without the holes. Then make another mold to make the holes. Then epoxy them together. Just easier to print the mold. Once I draw the holes, I will print one at 100% fill. Strongest setting. It might survive using a shop press to stamp a radiused hole.