Add config to set required craft time by percentage in 3 separate categories: science, hand crafting, and machine crafting from 0% to infinite; 0% being near instant, 100% being no change from default and anything over 100% making craft times longer.
Make machines consume proper fuel/energy for crafting. 100% / (machine craft time % setting). i.e. 25% machine craft setting requires 4 times the fuel/energy (100% / 25% = 4). Remember to not utilize this when craft times are set to 0%; nothing good happens when you divide by 0. If machine craft time % = 0, then divide by 1%.