Redesigns basic oil processing and blue science, reverting the poorly-conceived changes in 17.60. Optionally adds alternate streamlining which does not excessively simplify oil processing and which make realistic sense.
Instead of 5 minutes, you start with 56 minutes to make the challenge. Basically you have 10 times more time to do it, winning 10 times the rewards in seconds. Go to Scenarios and select More Time to do Supply Challenge.