Yesterday I managed to make the very first sand cast sides for the rotator. Its enough to put together the very first all-metal prototype, but hundreds more are to come.

The sides have very fine details and thin sections that are almost impossible to sand cast. Bigger companies use die casting for such things, but for that you'll need insanely expensive molds. But with lots of practice, a good alloy and "jävlar anamma" (meaning grit) as we call it in sweden, anything is possible.