Ooooooo yesssssss. Will totally be down for some stuff not working or backfiring because of wrong ingredients. Carlisle is pretty detail-oriented, but even he's not perfect. >:)

But yes, will get back with you guys on alchemical crap from his book when it actually becomes relevant! It's about the only sort of "magic" that isn't actually reliant on magical power from his world (it's less, like, Full Metal Alchemist alchemy and more "potions and potion-based utilities,") so I'm stoked. Thanks, mods!