Grindstone

You can use CrT to add or remove recipes form the AS grindstone.

Calling

You can call the InfusionRecipe package using mods.astralsorcery.Grindstone.

Removing

This will remove the first grinding recipe it finds that creates the provided IItemStack output.
If there are multiple recipes that return the provided output, you need to call this method multiple times!

//mods.astralsorcery.Grindstone.removeRecipe(IItemStack output);
mods.astralsorcery.Grindstone.removeRecipe(<minecraft:redstone>);

Addition

//mods.astralsorcery.Grindstone.addRecipe(IItemStack input, IItemStack output);
mods.astralsorcery.Grindstone.addRecipe(<minecraft:stone>, <minecraft:gravel>);

//mods.astralsorcery.Grindstone.addRecipe(IItemStack input, IItemStack output, float doubleChance);
mods.astralsorcery.Grindstone.addRecipe(<minecraft:cobblestone>, <minecraft:gravel>, 0.5f);