Centriphone Oneplus One

I saw the awesome video of Nicolas Vuignier
(https://www.youtube.com/watch?v=aqncOP7OzMg)
I wanted to try it, i don't have an iphone so i adjusted it in sketchup

I downloaded the original file from here http://www.centriphone.me/

If you are going to print this, note that I am not a professional designer so don't blame me if your phone flies away. The measurements are quit tight so you will need to sand the inside a bit. If you have print it, show me!
(sorry for the bad english i don't speak english)