She can't help but smile. This reminds her of that first time he came to her rooms. So many memories of that day.

She gently shifts her hands through his, palm to palm, letting him feel the way the arm works, feel the way it takes in new information and incorporates it into the model. She watches his face as he concentrates, fixing this moment in her mind.

"It should also limit the pain input from your left hand, but pain serves to remind us not to damage ourselves, so... Just be aware of that. It also may be a bit stronger than your right arm for that very reason. The musculature is more resilient than a human arm." She's speaking softly now, not wanting to intrude on his concentration.