I've been messing around with notepad editing for a few days now to make a late game byzantium. I really enjoy the Latin Handgunner unit for his unique look keeping to the aesthetic of the faction. Late Musketeers are completely different in this regard and look too German.

Beyond editing Latin Handgunners to be more like Late Musketeers - how easy would it be to add a musket to the Latin Handgunner unit and add to the roster? Removing the Late Musketeer as a result.

Where would the best place be to get started making this?