Demiko

It's ok to have empty nodes on the latest leaves of tech tree, but there is an empty gap before Atomic Engine. This gap is filled in Atomic Age but in stock game it's empty. Not very convenient having to spend science for empty node just to get that engine. Also, i've seen that picture but haven't understood anything =__=

Can I actually use SETI-Contracts and SETI-TechTree without other parts mods? There seems to be many science nodes which give nothing.