I am trying to ship small amounts of Bioflux from Gleba to Vulcanus without having a dedicated ship or using "full rockets" for this.

The plan is to have one ship (Gleba-ship) run between Nauvis and Gleba. At Gleba, it picks up 1 rocket (1K) of Bioflux. At Nauvis, it sends 900 Bioflux to the ground and 100 to a stationary platform at Nauvis (unless the platform still has 100 Bioflux, then everything should be sent to the ground).

Another ship (Vulcanus-ship) is running between Nauvis and Vulcanus. At Nauvis, it picks up the 100 Bioflux from the stationary platform (if available), and drops it on Vulcanus.

I am struggling how to configure the platforms to achieve this. Achieving the first part works: I set on the stationary platform a request for 100 Bioflux from platforms at Nauvis. When Gleba-ship arrives, it sends 100 Bioflux to the stationary platform and 900 to the ground.…