Interesting, though it seems quite dangerous. At least it kind of has a built-in failsafe - the electron beam will stop working if air enters the enclosure (unl

Interesting, though it seems quite dangerous. At least it kind of has a built-in failsafe - the electron beam will stop working if air enters the enclosure (unlike lasers used for selective laser melting, which would happily set metal powder on fire if given oxygen to do do).