Mod adds technologies to increase recipe yield for things like gears, copper wire, vanilla circuits, plastic, batteries, engines, and now even science packs. A ton of config settings. Instructions on how to expand items mod affects can be found within settings-values.lua or on the FAQ page above.

Progress update on steel.
I've found a method for enabling steel efficiency to work without the requirement of bob's plates, etc.....
however....bugs exist if research completes while a furnace is smelting steel. So.....till i can trace the fault and resolve that (omniLib) probably won't see a release candidate that fixes steel till then.

FullChangelog: https://mods.factorio.com/mod/crafting-efficiency/changelog

Original mod and author: https://mods.factorio.com/mod/efficiency