There is no "enable-grindstone" option in the config file.I tried to add it manually but it doesn't work.Now I can't disable it.

Right now, it and stonecutter both share the same perms as workbench. If a dedicated perm would be useful to you, just lmk and I can add it

I think it's useful. I don't think the portable GUI should be unlocked until the player has the ability to mass produce these blocks. I'd appreciate it if you could add dedicated perms back.

Resolved by c6e6db2

Just need to figure out how I want to handle existing permissions changing before I release...