Now you can add casting recipe for any fluid and any item if they are registered before IHL FMLPostInitializationEvent and they will be in NEI.
Thats how to use it:
"hash" will convert argument into string hash.
It is necessary for casting recipes to contain itemstack damage matching "resultSuffix" string hash.
I found another bug: fluidstack stopped worked (at least for workbench, didnt check other devices).
Iron workbench? Normal workbench? I don't get it, both of them does not support fluidstack input and never had. Iron workbench is not even a fluidtank.