Seems like a good idea for a mod, just not in the base game.

I’m not sure if there’s a “simple” solution to this. However, it is a pita to update blueprints with lots of parameters and my play style would greatly improve if previously set parameters and formulas were somehow kept

I solved this by only parking fluid trains in fluid-depot and item trains in item-depot .

So my entire base runs on two interrupts (one for items and one for fluids). The trains “know” what type of train it is by knowing the name of the depot it dispatched from.

All of the circuit work needed was ...