These guys (who make their bread and butter with film) have replied to my queries and have provided help. In terms of Polish saber they took the 1830 manual by Michał Starzewski and compared it to the 1824 German manual by Johan Adolf Ludwig Werner and found it in agreement. They offered to answer my queries and combined with the help everyone here is providing, (be it French, Italian, Cossack or otherwise) I think we're on the right track!
Edit = Some of the straight blade techniques do not quite work with a curved blade. The curve allows you to thrust around corners so to speak, so we've had to ensure our parries prevent that. Neat stuff!