This blueprint contains a compact tile-able factory section to produce red circuits. It needs a copper belt and a shared plastic/green circuit belt as input. It has room for substations (if desired to clean up the messy power line spaghetti) and a beacon so production can be ramped up even further in the late game with modules. Only basic red/green technologies needed for base layout (no underground blue belts at max distance). The screenshot shows 6 sections placed next to each other to have 36 assemblers worth of red circuit production.