Hey, I need to make a custom crafting machine so that I can have stacked recipies. I have no idea where to start. Any good tutorials for 1.8/1.9.

You need a class that extends Container, another class that extends Slot, a CraftingManager class (do not extend CraftingManager), a 4th class which extends GuiContainer, a GuiHandler which extends IGuiHandler and 2 final class which extends IRecipe, one for ShapedRecipe and the other for ShapelessRecipe. You will also need a class to handle your recipes. If you are going for the 3 by 3  like the vanilla's crafting table, you can copy the vanilla's classes, SlotCrafting, GuiCrafting, ContainerWorkbench, CraftingManager, ShapedRecipes and ShapelessRecipes.

You can find these classes in the following folders, minecraft/item/crafting, minecraft/inventory and minecraft/client/gui/inventory

 

To call for the Gui when the block is activated,

@Override
public boolean onBlockActivated(World world, BlockPos pos, IBlockState state, EntityPlayer player, EnumFacing side, float x, float y, float z)
{
if (!world.isRemote && !player.isSneaking())
{
	player.openGui(Main.instance, 0, world, pos.getX(), pos.getY(), pos.getZ());
	return true;
}
return false;
}

Remember to register the GuiHandler in the init method of your main class. To register, NetworkRegistry.INSTANCE.registerGuiHandler(instance, new GuiHandler());

To you can create an instance of your main class with this

@Instance(Reference.MOD_ID)
public static Main instance;

Technically speaking, you don't have to get that complex.  Its only if you want to be able to have 3x3 crafting bench recipes.

If your goal is to turn a "N-stack of Foo" into a "Y-stack of Bar" you can get away with a lot less.

Container

Slot

GuiContainer

IGuiHandler

CraftingManager (this is just a class that stores the hashmap of ingredients -> results, allows you to add recipes and get recipe results).

Thank you, will be trying to implement this tonight.