The next 3 casts were uneventful. I mixed the resin, and added brass powder to the resin 1:1 by weight. The brass powder settled a bit during the casting process, meaning that the underside of any raised surfaces didn't have brass powder on the surface. Shaking and tapping the mold didn't help all that much during this process, although they weigned in the neighborhood of 105 grams, almost exactly double the weight of the bubbly cast.