How to limit what a space station can drop?

[trancexpress]

I have some platforms that transport science packs between planets. Is there a way to tell those platforms to only drop science packs and not drop e.g. carbon that I'm requesting at the planet I drop science packs to?

[Muche]

If a platform is requesting something from the planet it's above, it won't drop it to the planet.
If you add a carbon = 0 request for that planet, it won't drop the carbon and also won't actually request it (if there is some on the planet and none on the platform).

If you do add it, make sure you review all platforms' schedule conditions that deal with requests (i.e. all requests satisfied, any request zero, etc.) if they work properly as you expect them to.

[trancexpress]

If a platform is requesting something from the planet it's above, it won't drop it to the planet.
If you add a carbon = 0 request for that planet, it won't drop the carbon and also won't actually request it (if there is some on the planet and none on the platform).

If you do add it, make sure you review all platforms' schedule conditions that deal with requests (i.e. all requests satisfied, any request zero, etc.) if they work properly as you expect them to.

Great, thank you, I'll try this.