I have one question: why is not the Kingdom of Bohemia separate factions? Year 1212 is symbolic for the Czechs, because this year got Bohemian King Ottokar I. (Přemyslid dynasty) by the Holy Roman Emperor Frederick II. "The Golden Bull of Sicily" (http://
en.wikipedia.org/wiki/Golden_Bull_of_Sicily). Bulla confirmed the hereditary kingship of Ottokar I. Kingdom of Bohemia became an autonomous state entirely independent of HRE. The only obligation of the Bohemian king was the election of the Roman emperor. So it is not true that the Kingdom of Bohemia was a vassal of the Holy Roman Empire. The word "vassal" for the Kingdom of Bohemia since 1212 is historically irrelevant.
Your work is amazing and I'm looking forward to the full version