Berenzy: Every rule can be broken
This city produces 40 Heavy Modular Frames, 35 Fused Modular Frames, and 20 Pressure conversion cubes per minute. Along with a small assortment of extra bits for dimensional depot storage.
After 507+ hours over the past year, 225km of belts, 25 km of pipes, 1150 production machines, more than a thousand blueprints (including prototypes), and over 50,000 signs, it's finally finished... The last cubes I should need to make for this play through.
This is (almost entirely) vanilla with default map settings (started this save when 1.0 launched). I used SCIM twice: once to make a perfect septagon blueprint for the aluminum tree, and again to fix an issue with the decorative dark matter pipes on the blenders not rendering their pipe indicators. No mods. Every curve you see was created using pillars snapped to rail splines, manually.
Every step of production I decided to do something new and different I've never tried before. The belt spirals used blueprints for the belt stands to get the angles, but placed manually. Auto-connect does not play well with this design.
The aluminum tree is a maximally efficient process turning 3900 bauxite into 5200 ingots. I answered my own question as to "why does no one use the default recipe and chooses to go for less yield with smelters?" The answer is 6500 silica per minute, that's why. (Coke, Circuit boards, plastic, and bauxite are imported from other outposts). This is also the most robust aluminum build I've made in almost 4000 hours in this game. It does not require flushing or fluid balancing. I can turn off the solid inputs and it will just work when I plug it back in. (And yes, I'm pumping water and 28 belts of items 400m into the air for basically aesthetic reasons).
Photos do not do this build justice. Watching the literal rivers of material flow constantly as the factory works is just mesmerizing. I, unfortunately, do not have the video editing skill to make anything worth watching.