gilded kindle
Please stick a timer on passive generation of the 3 main fuel converters.
Since they have such a long creation time, especially at low levels, knowing when exactly your converter will passively spit out crypton, hyperion, or solon would be super helpful! At low plot tier levels you can be totally locked out of doing anything once your Nexus gets to level 4.
At level 4 Nexus everything needs one of the 3 main fuel types to level up, either because it is gated behind Nexus 5, Workshop 5, or Fabricant 3. This causes gameplay to totally grind to a halt (not ideal) until a converter spits out a fuel, after 48 hours.