If you need some crystals or other stuff, what is not listed, you can do this with a little bit more work with tools like ArtMoney or Poke.
I suggest Poke, due to the simple interface and handling.
And because the amounts are all saved as integer, it is not that nut cracking difficulty to find the variables.
I suggest to play in windowed mode, because you dont have to alt-tab out of the game to search your RAM.
You need only one single item to cheat it, because even if the amount is zero, you see it ingame in your inventory.
If you use poke (remind to start as admin), first open your inventory.
Then click on Add..., put the amount in and simply click next. DWORD will do the job.
Now you put one (or more) item on the crafting table.
Search the new value.
You can check "Add all locations" when there are only 4 to 5 locations left.
Name it, if you want, maybe if you want to add some other stuff not listed.
You will see some of them are changing, these ones you can delete immediatly.
There are maybe 2 locations, which will change the same if you put items on the crafting table or take it of.
For this you can left inventory and let the game flowing a bit.
You will see that the amount of one location changes, one will stay.
Delete the flickering one and adjust the other at your will (doubleclick on current value).
It will change the amount directly, no need for save or other stuff.
Simple as hell. You need only to keep in mind: One Item, one location!
I suggest to leave the game and load the save, because the game crashed after a while when using poke for me.
Not the big deal, because it saves automaticly, but still a bit annoying.
Hope that helps for a while. :-)
PS: For me the trainer/editor works like a charm, but it wont show any axes, from stone to mithril.
Not a big problem, for this fact I can craft it and use poke.
But would be nice, if it come with the next game update. :-)