I was wondering if you can update the chemical science recipe? yours still uses solid fuel, new science uses sulfur.
Also what recipes does the green circuit unlock, does it eventually unlock a recipe for green circuits or it it just used to have other ways to get ore? Seems kind of random to omit a circuit efficiency path in favor of that.
Any other plans for additional specializations? I was thinking engines, landfill, stone bricks, concrete/refined concrete would be good ideas. Solid fuel, nuclear fuel, batteries? Solar/accumulators?