Stygian Iron Anvil is an interesting way to craft stuff.
Why not let modpack maker can use this to craft item or edit default recipes?
So CraftTweaker support or other method like JSON please.

I knew someone would ask for a JSON front end.
It should be possible to do, just a bit of tedious coding on my part.
If I do this, I'll move the current recipes to an external file as well.

+1 I would like to see this as a feature as well.