do check for silo craft recipe before removing machine crafting of silo, else result can be: mod A) removes ability to craft by hand, and mod B) removes ability to craft by machine, neither check if the other method exists, they assume it does, and removes the one they intend to remove. thus, check if another method to craft silo exists before removing.
If heart is set on forcing player to craft by hand, or by machine, and no recipe exists, generate one after removing the only other existing one.
