Pile Sorter production 180/min, with Prof / Mk3 Assembler / Pile Sorter. 360 iron & cct brd, 180 rest. 42 prof / min = 180 pile sorter /min Using less lower sorter, assembler, and prof just slows production. Can cut out Pile Sorter for just Belt Mk3 production. Compact and narrow to support placement almost anywhere.