I wanted to build a split Ergo from scratch, with a slightly more aggressive stagger than the Lily58 style board I had previously built. I also wanted to have a stabilized 2U spacebar and some RGB. The part that was most time-consuming was definitely designing the case in CAD and getting the switches and stabilizers to fit properly. Fortunately, it’s all pretty well documented so there wasn’t too much trial and error involved. Overall, it turned out pretty well!
Either he used ironing or an resin printer. I don’t know if you can get such a smooth surface with just ironing.
He could also sanded it