I noticed the "Electric trains" tech doesn't list the "Electric energy accumulators" tech as a requirement even though accumulators are one of the components of the E-train power provider. Not sure if this is intended behavior, but if it isn't, you might want to fix it so there's no confusion as to what techs are required for electric trains. It took me a while to figure out why I couldn't craft accumulators despite unlocking the electric trains tech.
