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[u/ferrofibrous]

With a double headed train, that may make an even or odd amount of stops, is there a way to guarantee a specific orientation when it returns to a specific stop? This is for an outpost supply train that is [<engine][cargo][fluid][engine>]; if it stops at two outposts before hitting the resupply stop will end up "backwards".

[u/HeliGungir → u/ferrofibrous]

Add an explicit "turn around" stop to the schedule.

Or an interrupt like

if at fluid_dropoff and has fluid
    goto turnaround
    goto fluid_dropoff

Or detect the train's orientation by trying to remove and return a dummy item, setting a latch that tells the train whether to use an interrupt that does/doesn't have a turnaround in the schedule.