Hi! Thanks for the compliment; we’re glad to hear it suits your needs! I think you could definitely add some or all of these rules into an existing story without starting over from scratch. Some of the rules/strategies in the document are more complicated or difficult to integrate than others, though. It’s worth being thoughtful of how the rule change will affect your specific game, and if those rule changes would help the game be more fun or just bog it down with confusing new information. Definitely let us know what you decide to do, and how it goes!