You need them all.
Truth be told, I purchased all three upgrade kits for my Unite Warriors Devastator. I wanted the hip flaps from this kit and the knee pads. I ended up using the hands with another kits forearm extensions. I personally think the kit is maybe really worth $20, but look who paid $75 because they could not wait. I am happy to have the parts I wanted but the shoulders look like trash compared to the other upgrade kits and the forearms make him gorilla armed. I asked every seller to just sell me the hip flaps. They know the racket they are running here with these over priced upgrade kits.
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