Casimir Crystals using Optical Grating Crystal - 405/min
18 Casimir crystal assemblers level 3 belts and sorts. The tower has kept up with the hydrogen so far. If you don't have optical grating crystals, change the assembler recipes and the tower to accept and dispense titanium crystals. Either will work. Inputs: Graphene, Optical Grating Crystals, Hydrogen...(lots of hydrogen LOL).