• We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
It should be possible to create new units, but I don't think there's any way to tie them to tech groups. This is something I'm researching for Europa Imperialis, so maybe I'll be able to provide more details soon.
 
Might be old, but I too would like a definite answer on this.

If not a new type, maybe a new variation within an existing type, like in EU3 and HoI.