About this 3D model

I think many of us have old cell phone at home. Well, I have several. They don't worth a penny for sale; so, I just make my Samsung S2 to become a lively decoration in my office. The hologram pyramid can be cut form acrylic transparent sheet. You can make yours with plastic book binding cover, see the link below by Harit Bandi: - http://www.instructables.com/id/HOLOGRAM-a-glimpse-of-future/ Or....simply get this: - http://hologrampyramid.net I have here 2 sets of bolt length. They both works, but shorter bolts would likely be more easy to drive into the hole if printing in lower resolution. I have also added a top cover in this revision. It is not a must, but it helps to provide better viewing quality if placed directly below bright light.