I don't watch Dr. Who, but I had a friend request a sonic screw driver after seeing the lightsabers I have been making. So I pleased when I found this design. This is a complex build with no instructions that I found. I printed these pieces a few times with different orientations to find the proper position and use as few supports as I could. I had to use the photos to figure out how to glue it together. Not to bad of a puzzle, and really cool when together, but it does seem fragile due to its size.