Build a "working" tricorder

Step 12 Final assembly

 First, finish the head.  Wrap your phone in a bit of plastic wrap for safety, then glue in the cardboard box. Use a black marker to color in any exposed areas that you had masked off, including the hinge slots, screw heads, etc.  Trim the hinge pins to the correct length, insert the head into the body, and press fit the pins.   I didn't use any glue on the pins -- it makes it easier to remove the head later if necessary.  

Use hot glue to mount the aluminum cross bar and the front panels.  Hot glue the door handles, then close up the back panel.