Your pour on the previous page reminded me of high school metal shop 1976. We were going to mass produce aluminum beer mugs with the school mascot on the design. First pour we didn't have enough air holes and only partially filled the mold. We fixed that and ended up with a couple of good prototypes. I guess we ended up only making about 5 mugs.
Think about what it would be like to have your classmates at a job site.