This is what I already did, subject to change, but imagine each of those columns on that very wide base for the base as one of these squares. That's what I have in mind.

Also a better highlight of what I think that should be my megabase and why do I call it Going Nutz
Only Yellow Belts
No modules
Lower Tier Possible for each recipe
Only Yellow Inserters with no stack bonus
No logistic bots for the base, only for my inventory
A giant refinery, leaving space inbetween each thing for safety like in real life.
Main bus at least 256 belts strong.
Try to go for one rocket every 10min, as this was the definition of megabase according to Negative Root.

Don't care about PC performance, if the base can't be actually be run, just imagine what it would be like.
Logistic Embargo Achievment
No extra speed gimmicks on my armor, at least up to 6 days of gameplay
Always think "if I owned a this factory for real, and had to walk trough it for real, how I would like it to look like?"
A super mega robot system to help me build this massive base. But no roboports everywhere, this is unreal and ugly.
Also no splitters on the main bus (but this may be dropped)