Off the top of my head... no I don't know, but have you tried to see if they are magnetic? If so, that would be a ferris metal, not aluminum. If not magnetic, then are they brass/bronze color? No? Then aluminum is possible. Are there any white-ish spots or flakes? Aluminum corrosion appears as white.
Hahaha... that's a good one!
From my experience too, there's always (even for a simple setup) something that will go wrong with these beauties.
By the way, I've found "incur" in my dictionary and "effed up" in the online urban dictionary (cool tool to understand english forum language); but not "DUI", would you please help me with this word? Is that some kind of acronym?