Hi dacendoran,
I have open the mod now and all working property, so:
- Do u have mods that modify game recipes? Like big overhauls?
- Do u have mods that reorganize crafting-tabs?
- Do u have unlocked the research of "Ducts" before try to craft anything?
- Have u look in all crafting-tabs?
I think at least one of these questions have inside the answer that u looking for, try them in the order that I give u. I hope u will solve ur problem.