Okay, I'm pretty sure mainstream02 is Super Sonico, who is a singer, I think? (Same goes for roadroller19, Rin Kagamine, another singer.) I was told singers count for the musician challenge.

And, now... do I have anything for analyzation07, capricorn08?

And I tend to separate my trade pile from my main post to lessen the lagging? Or something? (Maybe this would work?)