We picked up a copy of SETI this week and decided it needed an insert after a few plays. This was a tougher one because the box is so full, but we worked out a plan that holds sleeved cards, supports vertical storage, and has a couple neat features to help with setup.

Setup for this one is a special case as the aliens aren't revealed until mid-game. Their tokens are hidden under the main resources tray to take no table space, and their decks in the card tray have paper dividers to grab what you need. Full info on our insert here.
We also added a Quick Start Guide to get new players into the game. It answers all the questions we had after watching CGE's How to Play video. If you're looking to give this one a try, check it out!
