Hi, first of all, CORE is awesom,e but research is a bit obscure. Some techs need prerequisites to unlok that are on another research tab, so I can't see which ones they are. I just try to guess which ones are needed and that's a bit frustraing. Also, some techs are red/blocked like industrial economy for SU. Some hint says Su lacks advances in electronics, aviation and theoretical research to be considred an industrialised country. Is that technology unlocked when I research he appropriate techs? If so which ones are those exactly? Is there a manual? I read about an outdated one but haven't been able to find one.