1x2 72x stackers full input to full output single-stack for all

Saturates full space belt. Extra room for adding rotators or pins. Bottom layer 12x input is west port (short side). Top layer 12x input is split/shared by two north (long side) ports. The stacked shape is output on the east port (short side). This can be chained together to create multi-layered shapes with each new additional layer provided in the next one's north ports.