Player was attempting to craft this recipe for practice, doing the combine from known recipes in the kit. Player had not done this combine before but the kit equipped this recipe independently. When player clicked to make the recipe there was no combine, no edit message. Things just seemed to grey out momentarily. I was then befuddled as to how to council. But, player tried the recipe in Experiment mode and it combined. THEN, when player clicked on the selected recipe enumerated by the kit, the combine was successful.