In a new career mode save, you can obtain a late game engine

Setup:
1. Start a new career mode game
2. Enter the designer

Instructions
1. Add the starter Goblin engine to a craft
2. Navigate to the part properties tab
3. Change type from "Solid" to "Liquid"
4. See a late game engine
5. Make some adjustments to the engine while set as liquid
6. See the changes apply
7. Change type back to solid
8. Make any adjustment to the engine
9. See the engine revert to its early game variant