As an additional method for shutdown a separate, passively cooled container below the reactor is planned.

Ericsson's engine can easily be modified to operate in a closed-cycle mode, using a second, lower-pressure, cooled container between the original exhaust and intake.

Unlike Insect Lore, Swallowtail ships its butterflies fully developed, each in a separate little white box and all packed together in a cooled container to keep the butterflies calm for the journey.