Foldable Phone Stand Lite with Key Holder splitted

I would like to make a phone stand as lite as possible and with key holder.

I have carried out some research and found this design http://www.thingiverse.com/thing:3435575 that is a remix of https://www.thingiverse.com/thing:1666131

I have same modification to reduce the quantity of filament and I also spit it in two part, because I believe it is more strong if you print it flat on the bed.