I was looking through my Github repos and I remembered a PoC I made regarding this mod.
You can check it out here. While this is for an older version of your mod, it offered truly instant crafting. I didn't create a PR because I never got around to properly testing it. But if you're interested and have some free time, maybe check it out?

Wow, big thanks! With some changes I got it working and hopefully there won't be any bugs/crashes :)