Apologies if there is another route to create plastic, or the cards weren't added by this mod.

Plastic on Corrundum is locked behind Sulfonated Plastic, a research which requires electrochemical cards, but research servers (to make those cards) require both Electronic Components and red circuits, both of which themselves require plastic. Meaning that there's no way to make the tech cards without an external import of plastic.

Perhaps a small amount of coal could be added to the rocks on corrundum, just enough to get one or two research servers?

Since anything can be imported to this planet, I didn't see it as a problem. I fixed this minor oversight in the latest patch.

Thanks. Yeah, it's easy enough to import plastic (or the servers directly), so it's not a big deal, but since the planet seems to be designed to be completable from nothing, it's a nice thing to have.