I was going to chime in and say the same. FDM is great for foundry work, and resin is best for investment casting.FKreider wrote: ↑Wed Aug 12, 2020 7:45 am I have an FDM printer (CR-10) and have done a bunch of prototyping for castings along with a handful of actual sand patterns, it has been worth every penny!
I am seriously considering picking up an Elegoo Mars since its so affordable and highly recommended. My purpose would be the same as yours- for one off investment castings using castable resin.
I’ve been using 3D printing for over a decade and it still seems like science fiction.
Chris