Fully modular crystal shells from basic materials. Produces 30 crystal shell sets per minute with the Mk 1 assemblers, no proliferation possible since it sends the products directly into the next machine.  Consumes 270 copper, 60 combustible units, 90 titanium, 30 explosive units, 45 titanium alloy, and 30 crystal explosives per minute per grouping.  Double for Mk 3 assemblers.  Copper is the limiting ingredient, so this can handle up to 13 segments on a Mk 3 belt with fully stacked copper without needing an infusion of copper.