Thanks guys, wikll keep you posted on the mod.
See the point re the Surf, but think it's a bit degrading so will probably stick to Tech Faction worker.
Will, really like the idea of progressing from Mott & Bailey castles. Reminds me of Civilisation game in 1990s; makes me feel old. Would be difficult to square with steam-punk influences and presents modelling difficulties as mound does not work with what I've seen of unit creation (assumes flat building with four entrances?). Will possibly rename Manor as Keep, so thanks for the influence.