Assembly Kits and Combines

[Neiv]

I'm having some trouble with an armor materials combine, but not sure where to look to try to fix it. Is an assembly kit (combine box) considered a tradeskill per se , and is it thereby included in the regular recipes tables? How would I check to verify the components of a recipe for the armor material of a single armor piece? I've played with this for the past four hours and my eyes are now glazed over.

I'm also uncertain this is the best forum to post this, but it was my best guess.