When that set came out with POD in it, my best friend, my brother and myself split four boxes between us. My mate got a POD from one of his boxes.
At the sneak peak for that set, someone pulled a Duality and I traded a bunch of Blackwing stuff for it. I think it was like two Armor Master, two Armed Wing and some other Blackwings.
I found someone at a local who was looking to get rid of his duality. He put a price tag of £50 for it which I accepted. That's how I got those two Duality. They actually belong to my brother but since he cannot make Nationals (he has exams) I will borrow them.
My best friend tested out Karakuri Plants with good success but now he's assembled Samurai.