100 SPM base with
- No beacons
- No blue belts.
- Belt based (some bots are used to store excess and recycle science)
- Assembly machines use 3 prod modules 1 speed module wherever possible. Same for Oil refineries and chemical plants (but 2 prod modules 1 speed). Rocket silo and labs are all prod modules.
- No underground belt mixing (i.e. 2 underground belts of different colors criss-crossing).
- Similarly, no underground-belt and underground pipe mixing.
- Also, no mods :-)