User blog comment:The Forgotten Fragment/Hidden Blade sheathing mechanism/@comment-5499105-20130218143253/@comment-5499105-20130218150410

Well, I don't know... I only got this idea because Of the hidden blade test I did with 3D where as I could see the mechanism is indeed aligned with the arm's muscle and I made some tests and id did worked... However, I don't if there's a diagram.

Yeah, I had two Hidden Blade models made by myself(one of them got corrupted).