This 2-ILS hub is for a specific type of gameplay- if you are importing raw ingredients from another planet or system, and want them sprayed with proliferator before distribution across the planet.  Think of it as a planetary customs office.

The first hub (labeled Planetary Intake Hub):
- Imports up to 4 ingredients from off-world
- sends them down 3 belts apiece (except for item #4, which only has 2 belts- so use that slot for lower-throughput items)
- pushes them through sprayers across to the second hub
- has an intake behind it if you like to run warpers to your ILS using belts instead of logistics drones

The second hub (labeled Planetary Distribution Hub):
- takes the now-sprayed ingredients and distributes them on that planet only
- is the storehouse of proliferator for the sprayers.  Set by default to blue (Mk III) Proliferator, easily changed.

Advantages:
- You can use more compact hub designs; you no longer have to add sprayers on ingredient lines, but just on the output line.
- Easier to manage importing of offworld ingredients; place one or more of these right by each other and you can easily check them at a glance.

Disadvantages:
- Makes a choke point for high-volume imports; may need multiples of these hubs for some high-demand ingredients.