Except, in my mind, the CW Prime torso + limb trailer would've been Generations Powermaster Prime. Take your pick as to if it'd be Hi-Q or Roller that'd serve as the chest armor in combined mode. Unlike four individual Deluxe figures which could be turned into legs or arms to accommodate the gimmick, the trailer could've been designed so that there were two arms and there were two legs, which would've minimized the engineering and tooling. Since if you bought the Powermaster set you would have a torso and four arms and not have to worry about mixing/matching. Heck, I've got both versions of CW Prime and would gladly buy a third if it came packed with a limb-trailer. Or, at the very least, am shocked that no 3P has tackled this yet.