Lynk is an evolution of the original LunaTik watch kit, which is to say that its core is a two-piece aluminum frame that wraps around the iPod nano’s own body, exposing only the front glass, two of the sides, and the back clip, which is almost flush with the frame’s back. Thanks to large front and side bezels, this design has the advantage of protecting most of the nano from accidental bumps, though it doesn’t provide any screen,…