Hi, everyone!
Please remind me what techs I need to be able to start codex projects?
Hey! Two possible solutions:
1) Make any possible type of mission you haven't done yet. Look for the loot.
2) Open options, 'advanced', enable the "tech tree spoilers" => YES, then open the research screen, tap with middle mouse button on any unresearched topic, then press "Q", so the search line will appear (It's like Google, dude)
Type something related to the codex or drill, or hull or something that makes sense. And then look for the missing stuff within the tech branch.