Is there a way to make harvester platforms that can lack any significant fuel storage?
Implying their tankers will be directly loading fuel until full, with default orders to do so and the existing conditional to empty at a colony. An order to "withdraw fuel from harvesters (from parent fleet)" perhaps?
Right now I aim to have fuel harvesters have a years worth of tank capacity and then equally large tankers use a repeating series of normal orders 1)refuel from fleet 2) refuel from target colony 3) unload 90% at target colony. If I set the speed low enough that all three orders take a year to complete it works to continue forever. . . just tech and orbits mess with it a lot.
There is a way to do this in C# Aurora.
1) Designate the fuel harvesters as tankers and set their refuel status to 'Fleet';
2) Add a large tanker to the fleet but don't set it as a tanker.
3) Give the tanker a Condition of 'Fuel tanks Full' and a Conditional Order of 'Transfer Fuel To Colony'
The harvesters will continually refuel the tanker. When it is full, it will leave and find a colony with refuelling facilities. You will just need to order it to return.