But yes, I'd enjoy seeing people mod FoMT.
Looking forward to what you (and anyone else, for that matter) discovers about how the game works. 
For my own project, I adjust the price to real price standard to make the game more challenging.
Base on my research, 1 G in HM FoMT almost same as 1 Japan's Yen.
So I made some adjustment like price for cow is 200,000 G beside chicken price is good at 1,500 G (original price).
I still try to "dig" the hexa to find out more interesting things.
I'll upload the spreadsheet and hexa mapping later, after I make it more understandable.
If anyone have another research in HM-FoMT, I gladly to help your own project too.
March 11, 2019, 11:24:38 am - (Auto Merged - Double Posts are not allowed before 7 days.)
This spreadsheet is my documentation about what I found while reading the ROM's Hexa.
https://drive.google.com/file/d/1HZco38hT4fXyiU4TR5_8OD4m1zVAsSnV/view?usp=sharingsome interesting in recipes section are:
-we can put poisonous mushroom in miso, curry, and some recipes which give "bonus" SR:-60 FR:+20
-almost all edible things can tossed in curry and stew recipes
-Elli Leaves, which is legend for us that give SR 100 FR -50, can be improved by second recipe (Elli Leaves + colored grass) which I found that the maximum recovery is SR 190 FR -100 (I wrote the combination in the most right of recipe's child sheet).Feel free to do the experiment by what I share, you can message me if you need to ask some question (of course about what I shared), and if you found something else that we can improve this series hack better.
For NPC Sprites, I haven't done address mapping of each character, so I'll share it later.