I wish them the best, but to my knowledge most metal laser sintering setups involve powders so fine as to be both a fairly serious health concern and (depending

I wish them the best, but to my knowledge most metal laser sintering setups involve powders so fine as to be both a fairly serious health concern and (depending on the metal) a plausible fuel-air explosive if there's sufficient concentration in the air. It's not something that instills me with confidence when they self-describe as "scrappy", I'd like to see extra vigilance into the safety concerns.