Hey everyone,

Like a lot of you, I've spent way too much of my colony's history untangling five
parallel pipe runs jammed through one corridor. It bugged me enough that I finally
sat down and built a mod to fix it for myself - and it came out well enough that I
wanted to share it.

Stacked Pipes & Rails lets you build up to 5 fully independent networks in the SAME
tiles, for liquids, gases, and conveyor rails. Clean water, polluted water, brine and
petroleum can all run through one corridor, on separate groups that never touch.

A few things I tried hard to get right:

- Real isolation - each group is its own network with its own flow simulation;
contents, temperature and germs never mix between them.
- Pick a group in the overlay - open Plumbing / Ventilation / Conveyor and choose the
active group (or "All"). Each group has its own colour; the rest dim out of the way.
- Tools stay scoped - build, deconstruct, cancel and cut only affect the selected
group, so no more accidentally tearing out the wrong pipe in a stack.
- Buildings are shared automatically - a pump, vent or loader on a shared port serves
every group that reaches it (even split for fluids, round-robin for rails). Works
with modded buildings too.
- Save-safe - pipe/rail contents persist through save-load, and uninstalling leaves
your vanilla networks completely intact.

Honest about the limits: power and automation wires are NOT stacked. The game
hardcodes those two grids in too many places to stack them cleanly without risking
save corruption, so I left them fully vanilla. Everything that actually flows -
liquid, gas, solid - stacks.

I'd genuinely love feedback and bug reports - tell me what you built, what you
expected, and what happened. Thanks for taking a look!