Board Thread:General Discussion/@comment-33053086-20171110212327/@comment-4010415-20180204054144

I'm not sure that literally anyone could have a robotic scorpion tail. So far, we've only seen people have robotic prosthetics of body parts that they used to have and lost. It's entirely possible that the technology requires that the prosthetic replace a body part the person once had, due to the placement of the nerves that used to extend into that missing part.

We do know that the technology has its limitations, considering we've been told that the metal strip on Ironwood's forehead is actually a control device that he uses to control his robotic half. Unlike Yang and Mercury, he cannot command the entire prosthetic through nerves alone. He needs a device attached to his skull, receiving signals directly from his brain and broadcasting those signals to his prosthetic.

So, it may not be as simple as "Build anything you want and slap it on your body."