Edit:Topic reopened because more is known about the problem, here is the new info as I posted bellow:
I am trying to change a few items in hydrocraft ( http://steamcommunity.com/sharedfiles/filedetails/?id=498441420&searchtext=hydrocraft ) using darkslayer's item teaker api ( http://steamcommunity.com/sharedfiles/filedetails/?id=566115016&searchtext=Item+Tweaker+API ).
I was under the impression that this code would do what I want:
but it does not seem to work (Nothing changes in game) even after restarting the world.
I am attaching the full structure of the mod I created to do this with the code in it.
Thank you to anyone who can help.
BetterCarts.zip